Can't speak to the bottle

"The Bottle: Part 2"

It's a bottle-in-a-bottle with a shiny foil layer in between. Sort of a shitty Thermos design (the foil blocks radiant heat, the bottle-in-a-bottle acts like an air-gapped double-hung window. There's no vacuum like a Thermos but the air gap adds insulation) It keeps your water colder for a bit longer. It's a lot harder to squeeze than single-wall bottles.

The Camelbak Podium Big Chill is nicer to use but I only spent $1 a pop on my Polar bottles and can pass my front-tire cable through them to lock them to the bike temporarily.