40 oz Leak Proof Handle Flip Straw Lid Replacement for Stanley 40 oz Quencher H2.0 and ProTour Tumbler, Not for 30 oz Cups

The first thing i did was check if it leaked, and seemed to be fine... then after a week or so i noticed several leakages in my bag, put it down to not closing straw properly. Was carrying by its handle and the entire lid fell off, this has now happened several times. It loosens itself, as checked it when putting lid on. Really disappointed as bought to avoid it leaking all the time.

Leaks when falls over. Very bulky. good for price if no change of tilting to the side.

Initially this was near impossible to drink from but I cut the straw down a tiny bit so it’s not hitting the bottom of the tumbler and now it works great!! Love it! Sturdy and spill proof!

It does leak a little bit sometimes but I still like it for the price

Awesome! Fits my 40 oz and 64oz stanley perfectly. Spill proof too