United States Court of Appeals For the Seventh Circuit ____________________ No. 23-3171 RCBA NUTRACEUTICALS, LLC, Plaintiff-Appellant, v. PROAMPAC HOLDINGS, INC., Defendant-Appellee. ____________________

Appeal from the United States District Court for the Eastern District of Wisconsin. No. 2:23-cv-00305-WED — William E. Duffin, Magistrate Judge. ____________________

ARGUED MAY 29, 2024 — DECIDED JULY 26, 2024 ____________________

Before EASTERBROOK, BRENNAN, and SCUDDER, Circuit Judges. BRENNAN, Circuit Judge. RCBA Nutraceuticals, LLC contracted for the manufacture of zipper pouches to hold its protein powder. The pouches were made in Wisconsin by ProAmpac Holdings, Inc., which shipped them to companies in New York and Texas that filled them with RCBA’s prod- ucts. But the pouches turned out to be defective, so RCBA sued. Because RCBA’s claims were barred by applicable state 2