Maxpedition XBP Expandable Bottle Pouch (Black) 3.5 X 3.5 X 9 Inches.

When closed, the overall size is 3.5" L x 3.5" W x 9" H (8.9 x 8.9 x 22.9 cm). When open, the overall size is 3.5" L x 4.5" W x 9" H (8.9 x 11.4 x 22.9 cm). Top and bottom zipper garages prevent the zipper from dangling or making noise. There is also a bottom drainage grommet, allowing spilled liquids to drain out the bottom of the pouch. The adjustable dual-position bungee retention allows you to reposition the bungee cord to fit multiple bottle sizes. The TPU-840D nylon composite attachment backing allows modular attachment to larger bags and packs. Two tactile PJC5 polymer bonded clips are included for modular attachment. A rear pocket provides additional storage, and a custom positive-grip zipper pull makes opening the pouch quick and easy.