トレックタンブラー - シグネチャー

I was skeptical about the leak-proof claim, but it held up perfectly when I tossed it in my bag sideways. The double wall insulation keeps my coffee hot for hours, and the cupholder-friendly shape is a game-changer for my commute.

Left it sideways in my bag all day and not a single drop leaked out, even with the straw lid still on. The double wall really works too, my iced coffee was still cold hours later.

Took this on a 6-hour road trip and it fit perfectly in my cupholder, which never happens with my other tumblers. The lid didn't leak a drop even when it tipped over in my bag, and my ice was still there the next morning.