As you use it, it flattens down — so it takes up less room on the way home than it did on the way out, which is exactly what a travel bottle should do.
Segmented storage options allow you to organise all your gear and find anything you need on the go, so no need to empty everything to find that charging cable
"Always bring mine on trips with my mates. Holds a full bottle at the right temperature, and the magnetic tumblers mean drinks can be shared round the fire."