4 ms·

No information on how it works, what material it's made of, etc. The last thing I want is all my liquid intake to go thru a plastic cup.

• mikegreco 12y ago
  The FAQ states the inside is made of glass
  • kolev 12y ago
    I'm pretty sure it wasn't there when I checked as the TV show joke is below that I read up to it, but anyway. Now they say "specialized glass". Still not clear enough.