Bests & Worsts Reviews from Amazon

My wife and I love these cups. They are mostly spill proof and easy to clean. However, the rubber top of the lid has broken down after only a week and is falling apart (see photo). The top/lid is two separate pieces and the plastic part works fine but the colored rubber piece is the problem. To further the issue and driving the low rating is that the manufacturer, munchkin, does not sell replacement rubber tops. You have to buy all new cups.