Need to keep your jars sealed tight against dust, moisture, and odors? These PATIKIL foam lid liners are super handy. They're 21mm in diameter (about 0.82 inches) and 1mm thick, made from polystyrene foam (PS). Each pack comes with 100 pieces in white or red. They have a torque-activated adhesive coating — meaning once you press them into the cap and screw the lid on tight, they stick to glass, plastic, or metal containers over about 12-24 hours. No glue needed! They come with a paper backing you peel off before use, which keeps them clean in storage. Just make sure the cap surface is dry and free of oil before applying. A couple tips: they're best for dry or powdered products (not oily stuff), not reusable once removed, and not for high temps. Great for home canning, spice jars, supplement bottles, craft supplies… anything you want to keep fresh and sealed. Super easy to use and really effective.
