Review on KITESSENSU Boston Shaker Tins 20oz & 25oz: Premium Stainless Steel Cocktail Shaker Set with Recipes Booklet by Holly Robinson

Really liked these when I first got them. They don't leak and they fit perfectly: the smaller cup doesn't have to go too far into the larger cup to close it, allowing for more volume. After a few months the bottom of both cups started to warp causing them not to sit flush on the counter and it pisses me off. I don't know how it happened because I don't even put them in the dishwasher, not that you can't. I'm also not sure if that's how they came and I didn't realize it, which is very unlikely given I have OCD like this. I will negotiate but I wish I didn't have to. 2 stars because of disappointment