Wasserflaschen-Eiswürfelform

The ice spears chill my whole thermos in minutes, and they slip out of the tray without any wrestling. I've refilled it every morning since it arrived — even my regular bottle stays cold for hours.

The spears slide perfectly into my bottle’s opening, and honestly, my water stays cold way past the last sip. I’ve already made a second batch because the first one went too fast.

Dropping one of these spears into my insulated bottle actually keeps my iced coffee cold for my whole commute, which is exactly what I needed. They slide right through the standard opening without any fuss.