Posted by a reviewer on Amazon

However my biggest issue is that when my tumbler falls over it still leaks as if the lid is open

Posted by a reviewer on Amazon

However when cleaning the lid the slide piece pops off to allow cleaning under it

Posted by a reviewer on Amazon

One of the plastic fasteners broke off the slide piece and that renders the lid useless

Posted by a reviewer on Amazon

Had the slide piece not broken i would have rated the product higher

Posted by a reviewer on Amazon

I have bought a few of the spill proof lids other vendors and have found that the vent hole never works properly making it impossible to get any liquid out of you cup other than a drop at a time

Posted by a reviewer on Amazon

This product 1020oz size does not fit a simple modern travel cruiser 22oz

Posted by a reviewer on Amazon

I hope this will help others with the same mug avoid buying it and it not working

Posted by a reviewer on Amazon

They work great to replace the original which does not have a sip slot