Exhibit 99.1


                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

With  reference to and to accompany  the Annual  Report of Silgan  Holdings Inc.
(the  "Company")  on Form 10-K for the fiscal  year ended  December  31, 2002 as
filed with the  Securities  and  Exchange  Commission  on the date  hereof  (the
"Annual  Report"),  I, R.  Philip  Silver,  Co-Chief  Executive  Officer  of the
Company,  certify,  pursuant to 18 U.S.C.  Section 1350, as adopted  pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

     (1) The Annual Report fully complies with the requirements of Section 13(a)
     or 15(d) of the Securities  Exchange Act of 1934;  and

     (2) The information  contained in the Annual Report fairly presents, in all
     material respects, the financial condition and results of operations of the
     Company.


/s/ R. Philip Silver
--------------------
R. Philip Silver
Chairman of the Board and Co-Chief Executive Officer

March 31, 2003