TiciKim 2 Pack 40oz Tumbler Lid Compatible with Stanley Cup 40 oz Tumbler Flip Straw Lid Replacement Fit for Stanley Quencher Leak-Proof Splash Resistant Reusable Tumbler Cover (Orchid Purple)

These do fit my Stanley cups. I don't know why I can't figure out how to quickly get them to screw down but once I do, it works just great. I like that the straw and hole are nice and large. Easy set up. This is a good way to mostly seal it off when not using it but not building pressure and making it hard to drink because that is an issue I have had with the kits that help seal off all the holes on a normal lid. I have to get used to completing my drink and letting the water settle back down before quickly closing it because the water comes out the back end if I don't wait for that. It also sometimes leaks out when tipped but it definitely doesn't just drain out your entire cup. I like that the top is clear and you can see right in to know how much is left and anything else you want to know. I definitely like these lids. Very convenient and a great choice.

Fits my Stanley perfectly with zero spilling. No funny taste or smell. The color is a nice cream color. The flip straw does not really have a rubbery/cushy layer, which is fine, it’s just harder than I expected. Still super happy with this. It 100% has solved the problem of spilling when my Stanley gets tipped over.