100% platinum silicone sipping lid that fits on mason jars, mugs and alot more. It has 3 little gills that open up when you suck on them, then flatten back down to make a spill saver. It's for the table and your hand to replace disposable cups and lids, but this is not for your backpack, because it needs to stay upright to be totally sealed. BPA, BPS, PVC, Phthalate and plastic free, plastic is OVER if U want it 2B :)
The plastic free reusable silicone sipping lid is the product you didn't think you need, but once you have it, something you won't want to live without.