I got double-walled steel cups last year and I’m never going back to drinking things in ceramics or glass. Here’s why.

1. Even when the beverage is really hot, the cup’s insulating layer of air between its outer and inner steel walls makes things pleasant warm to hold on the outside.

2. The same design keeps the beverage inside hotter for longer. This is good if you’re the kind of person who likes to sip and enjoy your beverage while working or relaxing.

3. For cold beverages such as cold coffee, the cold metal inner wall feel pleasant to the tongue.

4. A steel cup is child-proof. Adult-proof too.

5. No leaking liquids from the bottom of the cup, as is the case of ceramics. Avoid table and cloth stains by design.

Update: In August 2021, I stumbled upon a glass equivalent.

I dislike ceramics and glass because they’re fragile and thermally terrible. I don’t care that they look pretty. But this one’s a good middle ground.