Things

The black is slick, fits in my hand, and holds temperature for a day.

Minimal, does not bother when walking. Spacious enough to walk with empty pockets.

Still using v2. It does its job, and gets out of the way.

I use as both Kyusu and fairness cup.

Fits 16" laptop, has second strap, and looks minimal enough not to bother.

After switching to loose leaf teas I needed a tool that could do a genuine job. This does it.