保溫水瓶（500 毫升）| 海軍藍

This navy bottle keeps my coffee piping hot during my entire morning commute, even when it's freezing out. The 500 ml size fits perfectly in my car cup holder too.

I've been using this for early morning commutes and my tea is still hot by lunch, which honestly surprised me. The 12-hour heat retention isn't just marketing talk. It's only 500 ml so I refill it once midday, but that's fine.

Took this on a hike last weekend and the water was still cold when I got back to the car, roughly 14 hours after I filled it. The 500 ml size fits nicely in my backpack pocket without adding much weight.