This is a really unique cup and does indeed insulate (though not as much as vacuum of course). The ceramic coating works well, though I wish they had a PFAS disclosure (could not find online!). There was a plastic-y smell upon first receiving, though after a couple washes went away.

Light weight, simple, fits in car cupholders, antispill lid, shockproof, no metalic aftertaste and so on. A bit pricey but totally worth it.

These are defenetly our favorite ''to go'' cups. They look great, feel great and keep your coffee temperature stable for so long.

+
Compact
Lightweight
Good quality
Great tasting coffee

-
Coffee cools quickly
Does not seal

A perfect option if you're drinking your coffee relatively quickly and the mug is sitting on a table or in your cup holder. If you want a fully sealed option or something that keeps coffee hot for hours, look elsewhere.

Coffee out of these cups tastes really good. It stays hot for a while and the kids seem fairly secure.

My one complaint it the little silver decal on the bottom of the cup. It makes the cup look really high end, but it's actually just a sticker that falls off very quickly exposing a tiny hole underneath. When that hole is exposed any water that hits it when washing the cup goes into that hole and pretty much never comes out. I did eventually get the water out and glued that sticker back on, but for $37, I feel that they could have done better.

Still, buy these cups. Coffee tastes very good out of them.