KUKSY2 PCS 40 oz Replaceable Tumbler Flip Straw Lid for Stanley Quencher, Reusable Tumbler Cover Fit for HydroJug Traveler, Spill-Proof Splash Resistant Tumbler Lids (White*2)

It fits perfectly on the cup , doesn’t spill at all . The only thing is when I put ice in it the night before , all of the ice I melted . The water is cold but there is no ice . With the original stanley the top suctions and keep the ice whole and it keeps it for a couple days

I bought another to try which leaked but this one did not leak. It fits my 40 Oz Stanley, please note this lid is not for a hydro jug, rather to make your Stanley not leak and more like a hydrojug.

dosn't fit hydrojug at all, ment for a stanley

These work just fine but kind of disappointing. The threading isn’t right so the straw does t line up either way you screw it on. It doesn’t leak and it does fit my off brand cup. The straw tends to fall off frequently inside the cup as well

This lid fits on my 40oz Stanley. Love this lid and the fact that it’s spill proof is fantastic.