Ahh. In that case, I'd recommend a phone waterproof bag, or even plastic bags. If you want a hard case, search around on Amazon for "small waterproof case/container". I would get anything with a zipper as those aren't very water resistant. These look pretty good:
2 Pack JOTO Waterproof Car Key FOB Case, Keys Holder Pouch Small Dry Bag for Surfing, Honda Toyota Nissan Tesla Ford Key Cover for Credit ID Card Cash Coins Badge Water Sports with Keychain -Clear https://www.amazon.com/dp/B09N6N2FMW/ref=cm_sw_r_apan_i_3M2R7KWQHENX5CFZEQFC
Or this:
3 Pieces Waterproof Case ID Card Badge Holder Floating Sports Case Locker with Hanging Ring and Rope 4.72 x 2.95 x 1.57 Inches (Clear, Gray, Blue) https://www.amazon.com/dp/B07T5CNX8R/ref=cm_sw_r_apan_i_FZFAHKS7KGH1XRRJVN41