This is a great accessory to have I like it so much better than just drinking straight out of the straw it doesn’t make me pursed my lips and it’s just my favorite now
These stay smooth straw toppers are fantastic! So easy to use, they stay put due to their ingenious design. The silicone helps prevent it from slipping, as well as the hole on one side is larger, so you slip that side on the straw. It narrows towards the top, so that it holds perfectly flush with the top of the straw. And it really does keep your upper lip smooth. I “tested in front of a mirror” and everything was smooth. Easy to drink from too! My only thought would be a design to add something to be able to seal the straw. Kind of like a topper, for this topper. Not an issue if drinking inside, but if outdoors, would be nice to seal the top.