the Iced Coffee Duo™ 14oz/400ml

I was skeptical about the silicone valve gimmick, but it genuinely stops the outside from getting slick with condensation—my desk stays dry even on a hot afternoon. The borosilicate glass feels sturdy, and the double wall keeps my iced coffee cold for a good hour or two.

I was skeptical about the air valve thing, but it genuinely stops the outside from getting all sweaty and dripping on my desk. Made a cold brew this morning and it's still icy three hours later, which is more than I can say for my old glass.

The double wall really works — my iced coffee stayed cold through a whole afternoon on my desk, and the outside never got sweaty. That silicone valve on the lid is a nice touch too, no annoying condensation puddles around the base.