Does the bottom unscrew? I think the inside is glass. Wash it with soap and water, and you are good to go.

They do break, so be careful. I doubt the Five and Dime downstreet carries replacements anymore. I was a buck-fifteen when I replaced my first one.

That thermos was the standard model that fit into the top of a Stanley Dinner Bucket. What you youngsters call a lunch box.

The five and dime became the Dollar Store, which is now the buck and a half store where I live. Woolworths and Ben Franklin were the brand names for Five and Dime stores.