Review on Hefty Disposable Hot Cups with Lids, 16 Ounce, 20 Count: Convenient and Reliable Drinkware for On-the-Go by John Benjamin

The mug itself is very good and well insulated. I can hold it with my bare hands when it's filled with almost boiling liquid. My only complaint is with the lid, which no matter how careful I am with it, always cracks in at least one and sometimes more than one spot on the edge, as in the picture. It doesn't always crack when I put it on, but it always breaks within minutes and there doesn't seem to be any way to control where it hits. If I'm lucky that day it will crackle on the opposite side of the drinking hole, but if it happens on the same side as the drinking hole it will spill with every sip.