24 Pack Silicone Straw Covers Cap, Compatible with Stanley Cup 1.0/2.0 40oz/30oz, Dust-Proof Tumbler Accessories, 0.4 in/8mm Drinking Straw Tips Lids Stopper

light weight, good value for the product, works great fit good in my 30oz Stanley, I’ve never had a spill problem with mine

The media could not be loaded. It was a little difficult to get in the hole but once in it did not leak a drop! Got this for my daughter to be able to take to school because her stanley leaked. 10/10 recommended.

I purchased these to place them on the straws for character souvenir cups. Any parent knows how easy it is for kids to confuse their cups, especially when they have the same one. I used these to help color coordinate who's cup was who’s and it worked perfectly. My young children were able to put the straw covers on the cups independently and remove them as well. I much prefer this as to writing their names on the cups.i would purchase these again.

Wonderful fit and watertight! It does require a larger straw than my Stanley came with, so purchased that as well. The only downside, is the mouth piece part slips out of place easily if the straw is knocked out of place. It's easy to pop back in, but still just a little inconvenient. Otherwise, 5 stars.

If you attach these, yes, it makes it spill proof, but you can’t suck from the straw. When you suck through a straw, it needs air, but if you attach all of these, you’ve just created an air tight container (think of drinking a super thick shake and not being able to get anything out of the straw). Therefore, while using these, every time I would try to take a drink the inner stopper would pop off, thus allowing my cup to once again leak if tipped over. Once it pops off, in order to place it back on and make the cup leakproof again, you have to fish the attachment out of your drink…every time you take a drink. I’m assuming the 5-star ratings are from consumers who love the idea and haven’t actually tried it yet. It’s a great idea if it actually made my Stanley leakproof. I should return these, but at this price, it’s not worth the hassle! That’s what I get for listening to an Instagram influencer saying they are the best ever.

Excelente producto

These are cute but pointless at least for my version of the Stanley cup. They don’t fit the fold down straw. I’m not planning to buy a different lid type so they will not be used.

Well, at first, everything worked. I then showed a family member the setup and did the flip with water; sure enough, it started leaking. I couldn't understand what happened, so I removed the lid, and the silicone that air is supposed to escape in the middle of the lid was in the water. I have to fish it out of the water every time I add more water to my Stanley, and it's a pain in the arse. I fixed it back on the area as I have a Flowstate Quencher H2.0, and again, the silicone in the middle for air was floating in the water. I wasted money and am disappointed!