Practical, with a strap that holds securely, easy to use and can accommodate bottles with a larger diameter than an average 750 ml bottle.

For some reason, I expected it to be bigger. It's a struggle to fit the large 1.5-liter bottle. It fits perfectly in the 40-liter Mil tec bag. Overall, I am satisfied with the product.

Very good quality.
It can be used to hold a bottle, a thermos, a water filter, or a waterproof item, as well as tools. It can also be used as a collector for shells.
It can be externally attached to a backpack or belt. It fastens very well without making noise or moving. It protects the stored product from light, heat, and impacts.