This is the GSI Hip Flask S, a collaboration model with GSI Outdoors, a company founded in the United States in 1985. This flask is designed for portability and comfort, featuring a rounded shape that fits well in the hand and pocket.
Yeti
The Rock Shop
Snow Peak
Afield Out
A Bathing Ape
Carhartt WIP
Nalgene
Tabi
Chillys Bottles