1 point@Dakotagrafx Thanks for replying! Good point. We get our mugs from Orca which I believe they are on the higher spectrum? https://www.photomugs.com/collections/orca-ceramic-mugs We've noticed that enamel camp mugs have literally no issues but 11oz ceramic come out the worst. 15oz ceramic are also iffy but better than the 11oz. I have some Gator mugs that I can test out but I'll see if I can grab some of these Marck mugs as well.