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                                                                     EXHIBIT 2.2

                 AMENDMENT NO. 1 TO AGREEMENT AND PLAN OF MERGER

        This AMENDMENT NO. 1, dated February 27, 2004 (this "Amendment No. 1"),
to the Agreement and Plan of Merger, dated as of December 22, 2003 (the
"Agreement"), by and among Solo Cup Company, an Illinois corporation ("Parent"),
Solo Acquisition Corp., a Delaware corporation ("Merger Sub"), and SF Holdings
Group, Inc., a Delaware corporation (the "Company").

        WHEREAS, the parties hereto desire to amend and supplement certain
provisions of the Agreement; and

        WHEREAS, Section 11.2 of the Agreement provides in relevant part that
the Agreement may be amended, modified and supplemented by the parties thereto
by an instrument in writing signed on behalf of each of the parties thereto.

        NOW, THEREFORE, in consideration of the foregoing and the mutual
representations, warranties, covenants and agreements set forth herein, the
parties hereto, intending to be legally bound, agree as follows:

1.      Unless the context otherwise requires, references in the Agreement to
        "this Agreement" shall be deemed to be references to the Agreement as
        amended and supplemented by this Amendment No. 1.

2.      The Agreement shall be amended and supplemented by the addition of the
        following sentence after the first sentence in Section 1.4 of the
        Agreement:

               At Parent's election, the Merger may alternatively be structured
               so that at the Effective Time, Merger Sub is a wholly-owned
               Subsidiary of an affiliate of Parent.

3.      Section 3.8(a) of the Agreement shall be amended and restated in its
        entirety as follows:

               (a) The Company will cause to be delivered to Parent, two
               business days prior to Closing, (i) an estimated statement of the
               consolidated Working Capital of the Company (calculated in a
               manner consistent with Exhibit 3.8(c)(i)) as of 11:59 p.m. on
               February 22, 2004 (the "ESTIMATED WORKING CAPITAL STATEMENT") to
               be prepared in good faith in conformity with United States
               generally accepted accounting principles ("GAAP") applied on a
               basis consistent with the Target Working Capital and (ii) a
               certificate as to the preparation of the Estimated Working
               Capital Statement executed by the chief financial officer and
               chief executive officer of the Company. Parent and its
               representatives shall have full access to all relevant books and
               records and employees of the Company in connection with the
               Company's preparation of the Estimated Working Capital Statement.
               On

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               February 21, 2004 and February 22, 2004 (the "INVENTORY DATE"),
               the Company, Parent and/or their respective representatives will
               complete a physical inventory, observed by the Stockholders'
               Representative. The value so attributed to inventory shall be
               final, binding and conclusive for purposes of Section 3.8(c), 3.9
               and Section 3.11. For purposes of this Section 3.8(a) and
               Sections 3.8(c), 3.9 and 3.11, any interest on Indebtedness
               deducted in the calculation of the Aggregate Merger Consideration
               pursuant to Section 3.8(b) shall not be accrued as a current
               liability, or deducted, in the determination of the Working
               Capital of the Company as of 11:59 p.m. on February 22, 2004,
               notwithstanding that accrued interest was included in the
               calculation set forth on Exhibit 3.8(c)(i).

4.      For purposes of the calculation of the Aggregate Merger Consideration
        pursuant to Section 3.8(b) of the Agreement, (i) all items set forth on
        Exhibit A attached hereto shall be deemed to be "Indebtedness," (ii) the
        aggregate amount of Indebtedness (including accrued interest through the
        Effective Time) outstanding under the Third Amended and Restated Loan
        and Security Agreement, dated as of March 22, 2002, as amended, among
        Sweetheart Cup Company, as Borrower, the financial institutions named
        therein as the Lenders, and Bank of America, N.A., as Agent (the "CREDIT
        AGREEMENT"), shall be deemed to be US$ 159,215,615.43, and (iii) the
        aggregate amount of Indebtedness (including accrued interest through the
        Effective Time) outstanding under the Credit Agreement, dated as of June
        15, 1998, as amended, between Lilly Cup, as Borrower, and General
        Electric Capital Canada Inc., as Lender (the "CANADIAN CREDIT
        AGREEMENT"), shall be deemed to be US$ 12,796,503.58.

5.      Section 3.8(b)(iv)(C) of the Agreement shall be amended and restated in
        its entirety as follows:

               (C) all amounts paid or payable to acquire Cupcorp, Inc. pursuant
               to the Cupcorp Option Agreement,

6.      The first sentence of Section 3.9(a) of the Agreement shall be amended
        and restated in its entirety as follows:

               As soon as practicable, but in no event later than 60 days
               following the Effective Time, Parent shall prepare and deliver to
               the Stockholders' Representative a statement of the consolidated
               Working Capital of the Company (calculated in the manner
               consistent with Exhibit 3.8(c)(i)) as of 11:59 p.m. on February
               22, 2004 (the "CLOSING WORKING CAPITAL STATEMENT").

7.      The Agreement shall be amended and supplemented by the addition of the
        following at the end of Section 3.10(b) of the Agreement.

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               ; PROVIDED, FURTHER, HOWEVER, that to the extent set forth in the
               Retention Escrow Agreement, the Deferred Payment Retention shall
               be reduced by an amount equal to the portion of such earnings
               distributed to Parent in connection with Parent's tax obligations
               with respect to such earnings. The Company and the Stockholders'
               Representative will jointly prepare and deliver to the Paying
               Agent all necessary calculations to permit the Paying Agent to
               make payments with respect to the Deferred Payment Rights.

8.      The Agreement shall be amended and supplemented by the addition of the
        following sentence at the end of Section 4.9(b) of the Agreement:

               Cupcorp. Inc. has no liabilities or obligations of any kind
               whatsoever, whether accrued, contingent, absolute, determined,
               determinable or otherwise.

9.      Section 7.10(b) of the Agreement shall be amended and restated in its
        entirety as follows:

               (b) the Company to consummate the purchase of Cupcorp, Inc.
               pursuant to that certain letter agreement between the Company and
               TCW Shared Opportunity Fund II, L.P., dated December 19, 2003
               (the "CUPCORP OPTION AGREEMENT"), immediately prior to the
               Effective Time such that as of the Effective Time, Cupcorp, Inc.
               and its wholly-owned subsidiary Newcup LLC shall be direct or
               indirect wholly-owned subsidiaries of the Company.

10.     Section 8.3(f) of the Agreement shall be amended and restated in its
        entirety as follows:

               All the Newcup Notes shall have been repurchased or redeemed by
               Newcup with funds provided to the Company by Parent, Newcup shall
               not own any 2008 Notes, Cupcorp, Inc. Newcup and Sweetheart
               Holdings, Inc. shall each be wholly-owned Subsidiaries of the
               Company, and the Company and each Company Subsidiary shall have
               been released from their obligations under the Newcup
               Arrangements as provided in Section 7.10.

11.     The Company represents, warrants, covenants and agrees that

        (a)    Item 1 on Exhibit A attached hereto sets forth a true and correct
               list of all fees, costs and expenses incurred, or to be incurred,
               by the Company in connection with the Agreement and the
               transactions contemplated thereby that have not been either (i)
               paid in full by the Company prior to February 22, 2004 or (ii)
               fully accrued on the Estimated Working Capital Statement;

        (b)    (i) the aggregate total amount payable with respect to the letter
               agreements described in Section 7.13(a) of the Company Disclosure
               Schedule is US

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               $9,339,500, (ii) such amount has been fully accrued on the
               Estimated Working Capital Statement, (iii) neither the Company
               nor any Company Subsidiary has any liabilities with respect to
               such letter agreements in excess of the amounts so accrued and
               (iv) all amounts payable with respect to such letter agreements
               will be paid by the Company prior to the Effective Time;

        (c)    (i) the aggregate total amount payable pursuant to Section
               7.13(c) of the Agreement with respect to charitable pledges made
               by or on behalf of the Company is US $1.8 million, (ii) such
               amount has been paid prior to February 22, 2004 or fully accrued
               on the Estimated Working Capital Statement, (iii) neither the
               Company nor any Company Subsidiary has any liabilities with
               respect to such pledges in excess of the amounts so accrued and
               (iv) all amounts payable with respect to such pledges will be
               paid by the Company prior to the Effective Time;

        (d)    Item 2 on Exhibit A attached hereto sets forth the total amount
               payable by the Company in connection with the redemption by the
               Company of the Class C Common Stock held by American
               International Life Assurance Company of New York;

        (e)    US $ 158,662,357.79 represents the aggregate amount of
               Indebtedness (including accrued interest) outstanding under the
               Credit Agreement as of February 22, 2004;

        (f)    US$ 12,737,332.86 represents the aggregate amount of Indebtedness
               (including accrued interest) outstanding under the Canadian
               Credit Agreement as of February 22, 2004;

        (g)    Since February 22, 2004, the Company

               (i)     has not incurred, and from and after the date hereof
                       until the Effective Time will not incur, any liabilities
                       or obligations of any kind that would be required to be
                       reflected on a statement of the consolidated Working
                       Capital of the Company as of the Effective Time
                       (calculated in a manner consistent with Exhibit 3.8(c)(i)
                       to the Agreement) prepared in accordance with GAAP
                       applied on a basis consistent with the Target Working
                       Capital, except for liabilities or obligations incurred
                       with respect to (A) trade payables for the purchase of
                       goods and services arising in the ordinary course of
                       business consistent with past practice, (B) salary and
                       welfare benefits for employees of the Company and the
                       Company Subsidiaries in the ordinary course of business
                       consistent with past practice (which for the avoidance of
                       doubt shall not include any bonus or other compensation
                       payable in connection with, or otherwise related to, the
                       transactions contemplated by the Agreement or payments of
                       any kind to affiliates or associates of

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                       the Company or any of its affiliates) and (C) the fees,
                       costs and expenses incurred by the Company in connection
                       with the Agreement listed on Item 1 of Exhibit A attached
                       hereto; and

               (ii)    has not sold, transferred or otherwise disposed of, and
                       from and after the date hereof until the Effective Time
                       will not sell, transfer or dispose of, any (A) current
                       asset (including ant payment of cash whether provided
                       from operations, borrowings under the Credit Facility or
                       otherwise) reflected in the Estimated Working Capital
                       Statement or (B) other current asset (including ant
                       payment of cash whether provided from operations,
                       borrowings under the Credit Facility or otherwise),
                       except for (1) sales of inventory in the ordinary course
                       of business consistent with past practice and (2) cash
                       payments with respect to trade payables for the purchase
                       of goods and services that arose in the ordinary course
                       of business consistent with past practice, the express
                       terms of which required payment prior to the Effective
                       Time; and

        (h)    As of the Effective Time, the aggregate amount of Indebtedness
               (including accrued interest) outstanding under the Credit
               Agreement shall not exceed US $151,697,235.38.

        (i)    As of the Effective Time, the aggregate amount of Indebtedness
               (including accrued interest) outstanding under the Canadian
               Credit Agreement shall not exceed CA$ 17,633,743.72.

        The representations, warranties, covenants and agreements set forth in
        this Item 11 of this Amendment No. 1 shall (i) not be subject to the
        limitation on indemnification set forth in Section 10.1(b) of the
        Agreement and (ii) for purposes of the condition set forth in Section
        8.3(a) of the Agreement must be true and correct in all respects as of
        the Effective Time.

12.     For purposes of Section 6.1 of the Agreement, Parent hereby consents to
        the Company entering into the agreements set forth on Exhibit B attached
        hereto.

13.     For purposes of Sections 7.10(c) and 8.3(f) of the Agreement, the
        Company shall be deemed to have satisfied its obligations relating to
        the release of the Company and each Company Subsidiary from any and all
        obligations with respect to the Newcup Arrangements when (i) the
        documents included in Exhibit C attached hereto have been duly and
        validly executed by the signatories thereto, (ii) such documents have
        been delivered to Parent and (iii) all conditions to the effectiveness
        of such documents have been satisfied.

14.     Except as specifically set forth in this Amendment No. 1, the Agreement
        shall remain in full force and effect.

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15.     This Amendment No. 1 shall be governed by and construed in accordance
        with the laws of the State of Delaware without giving effect to the
        principles of conflicts of law thereof.

16.     This Amendment No. 1 may be executed manually or by facsimile by the
        parties hereto, in any number of counterparts, each of which shall be
        considered one and the same agreement and shall become effective when a
        counterpart hereof shall have been signed by each of the parties and
        delivered to the other parties.


                            [Signature page follows.]

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        IN WITNESS WHEREOF, Parent, Merger Sub and the Company have caused this
Amendment No. 1 to be signed by their respective officers thereunto duly
authorized as of the date first written above.


                                            SOLO CUP COMPANY


                                            By /s/ Ronald L. Whaley
                                              ---------------------------------
                                              Name:
                                              Title:


                                            SOLO ACQUISITION CORP.


                                            By /s/ Ronald L. Whaley
                                              ---------------------------------
                                              Name:
                                              Title:


                                            SF HOLDINGS GROUP, INC.


                                            By /s/ Hans H. Heinsen
                                              ---------------------------------
                                              Name:  Hans H. Heinsen
                                              Title: Sr. Vice President and CFO

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EXHIBIT A

<Table>
                                          
1.     a) Jefferies & Company, Inc.             $ 7,273,636.22
       b) Harris Williams                           500,000.00
       c) Kramer Levin                              574,617.27
       d) TCW                                        65,924.13
       e) Audax                                     10, 845.60
       f) Bank of New York                           10,000.00

2)     $ 2,536,435.00
</Table>

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EXHIBIT B


1)   Warrant Agreement, dated as of January 22, 2004, entered into by and
     between Newcup, LLC and Sweetheart Cup Company Inc.

2)   Letter of Intent, dated February 19, 2004, between Earth Shell O.M., LLC
     and Sweetheart Holdings Inc.

3)   Amendment to the letter agreement, dated September 22, 2003, between SF
     Holdings Group, Inc. ("SF") and Harvey L. Friedman.

4)   Amendment to the letter agreement, dated September 22, 2003, between SF and
     Thomas Uleau.

5)   Amendment to the letter agreement, dated September 22, 2003, between SF and
     Ingrid Santiago.

6)   Amendment to the letter agreement, dated September 22, 2003, between SF and
     Hans H. Heinsen.

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EXHIBIT C

1) Option Exercise and Agreement of Transfer, dated as of February 27, 2004, by
and among SF Holdings Group, Inc., NewCup, LLC, Audax Mezzanine Fund, L.P.,
Audax Co-Invest, L.P., Audax Trust Co-Invest, L.P. and AFF Co-Invest, L.P.

2) Release Instruction Letter, dated February 27, 2004, addressed to
TCW/Crescent Mezzanine, L.L.C.

3) Release in favor NewCup, LLC, dated February 27, 2004 from TCW/Crescent
Mezzanine, L.L.C., as collateral agent

4) Release in favor SF Holdings Group, Inc., dated February 27, 2004 from
TCW/Crescent Mezzanine, L.L.C., as collateral agent