Leak-proof Silicone Seal kit for Stanley Tumblers

Circular leak-proof plug: Installed in the middle of the cover for sealing, with a opening design to ensure air entry during drinking water, making drinking water easier. Square anti overflow plug seal: Installed in the suction tube hole of the cover, not only forming a seal, but also fixing the suction tube. Silicone material: A set of 3 anti overflow plugs, which are food grade silicone and can be reused. They do not contain bisphenol A and can be cleaned by a dishwasher.