Exhibit 21 SUBSIDIARIES OF U.S. CAN CORPORATION NAME OF COMPANY JURISDICTION OF INCORPORATION TRADE NAME - --------------- ----------------------------- ---------- United States Can Company (1) State of Delaware, U.S.A. U.S. Can USC May Verpackungen Holding Inc. (2) State of Delaware, U.S.A. n/a U.S.C. Europe N.V. (3) Netherland Antilles n/a U.S.C. Europe Netherlands B.V. (4) Netherlands n/a May Verpackungen GmbH & Co. KG (5) Germany n/a - ------------- (1) U.S. Can Corporation owns 100% of the shares of United States Can Company (2) United States Can Company owns 100% of the shares of USC May Verpackungen Holding Inc. (3) United States Can Company owns 100% of the shares of U.S.C. Europe B.V. (4) U.S.C. Europe N.V. owns 100% of the shares of U.S.C. Europe Netherlands B.V. U.S.C. Europe Netherlands B.V. has nine foreign subsidiaries engaged in metal can manufacturing in Europe, and also owns 36.5% of Formametal S.A., an Argentine metal can manufacturer. (5) USC May Verpackungen Holding Inc. owns 100% of the shares of May Verpackungen GmbH & Co. KG. May Verpackungen GmbH & Co. KG has four foreign subsidiaries engaged in metal can manufacturing in Europe. SUBSIDIARIES OF UNITED STATES CAN COMPANY NAME OF COMPANY JURISDICTION OF INCORPORATION TRADE NAME - --------------- ----------------------------- ---------- USC May Verpackungen Holding Inc. State of Delaware, U.S.A. n/a U.S.C. Europe N.V. Netherland Antilles n/a U.S.C. Europe Netherlands B.V. (a) Netherlands n/a May Verpackungen GmbH & Co. KG (b) Germany n/a - ------------- (a) See footnote (4) above. (b) See footnote (5) above. SUBSIDIARIES OF USC MAY VERPACKUNGEN HOLDING INC. NAME OF COMPANY JURISDICTION OF INCORPORATION TRADE NAME - --------------- ----------------------------- ---------- May Verpackungen GmbH & Co. KG (i) Germany n/a - -------------- (i) See footnote (5) above.