EXHIBIT 21.01 SUBSIDIARIES OF PORTOLA PACKAGING, INC., A DELAWARE CORPORATION Portola Packaging Canada Ltd., a Canadian federal corporation (operating) Portola Packaging Ltd., a U.K. corporation (formerly Cap Snap Limited, a U.K. corporation, which was formerly Cap Snap (U.K.) Ltd.) (operating but not significant pursuant to Item 601 of Regulation S-K) Portola Packaging Ltd. (also known as Emballages Portola Ltee), a Canadian federal corporation (operating but not significant pursuant to Item 601 of Regulation S-K)