8pcs Stanley Spill Stopper for Stanley Cup 40oz/30oz H2.0, Silicone Spill Proof Stopper for Stanley 30oz With Clear Straw Topper, Cute Cloud Straw Covers

I carry my Stanley in my tote bag going into the office so my hands are free and this little set works perfectly to prevent leaks. I realized once in the beginning that my cup had leaked all inside my tote and onto my jacket. This little set is completely silicone, clear-ish white, and when my cup gets tilted sideways or when water is sloshing around from being carried it doesn't leak at all. Now as I'm taking these pics I held the cup angled upside down and fluid was coming down the straw in a slow drip. My cup never goes fully lateral so that's not a big problem for me. This set works perfectly for when Stan is in my tote in the passenger seat and I'm walking with it. No spills!! I love it.

Great price for how efficiently it has stopping the water from my Stanley Cup from leaking! It fits perfect on my 30oz Stanley Cup. It is easy to use but it is a bit hard to put on initially. Once you get the hang of it, you’ll be able to put it on with ease the next time! It is of high quality thus far! Will provide an updated review later on.

The pink flower was an adorable addition to my daughter’s Stanley. It has been knocked over and tipped in her bag several times with no leaks so far. I am able to hold the cup upside down and still nothing comes out.

Super cute and work well

I love these! now my stanley is leakproof and the cloud topper is cute!

This is a great value pack. It is durable, fun, and fit perfectly for Stanley cups, making them spill proof.

Works good. Cats paw lol. I have black cat so this is good one. Does keep from leaking. Now where straw enters cup water may slowly drip out when on its side but nothing from cats paw stopper.

They don’t stop spills as advertised