7Pcs 0.4in/10mm Diameter Silicone Straw Covers Cap Compatible with Stanley 20 30&40 Oz Cup, Straw Toppers for Stanley 40 Oz Tumbler with Handle, Dust-Proof Straw Caps for Water Bottle

I have several water bottles that I use regularly to avoid disposable bottles for water. Most of those reusable water bottles did not come with anything to cover the straw. Really needed some stroll covers to avoid start getting in insects getting in and also to potentially avoid or minimize some spills. These worked great over two different size straws that I had. They're made for the larger straws, but they also fit my smaller straw so I am very happy with them. The colors were really nice too.

Perfect especially for the price

Works great for the Stanley cups.

These are fantastic & keeps bugs out of your drink. Easy to open too. Sturdy. Used mine daily for approx 6 mos and no sign of ware. Easy to clean.

Fits snuggly over cup straws flexibility enough to stop water flow