These are some of my everyday mugs--several years ago I found a set of them at an "antique" store (that term is used loosely around here and often incorporates a lot of actual junk). I love the contrasting robin's-egg interior.
I stopped by the real junk store last week and was delighted to find another one! I don't know much about them except that they say "Taylor-Made" on the bottom. And they are good for cocoa.