Have you ever seen a more perfect gift for the socially anxious than this "Ask my about my social anxiety" camping mug? After all, you know how much we introverts LOVE to be approached by strangers and asked about ourselves. Especially without warning or several days to prepare a response ahead of time. We socially awkward live for this stuff.
Vintage reproduction enamel mugs are made from a thick enamel-coated steel. They are heavy (for enamel mugs-- still lighter than ceramic), smooth, wonderful to drink from, and crazy sturdy. You can abuse the heck out of them.
MICROWAVE & DISHWASHER USE:
These are steel under enamel. So please don't use them in the microwave unless you want to create a localized lightning storm in your kitchen and pretend you're Harry Potter. Or Voldemort.