3Pcs Silicone Spill Proof Stopper Set for Stanley Cup 1.0 2.0 40oz/30oz
For version 1.0/2.0:compatible with stanley tumbler 1.0/2.0 40oz & 30oz. 3Pcs Spill Proof Stopper Set. Square Spill Stopper Seal:Installed in the straw hole of the lid, it not only forms a seal, but also holder the straw.