GEIGERRIG hydration pack with maximum fill line, 3L capacity, easily usable with a manual pump. This hydration pack is convenient for staying hydrated without sucking. I also have a half-size 1.5L one, and I had been storing the 3L one without using it. However, a considerable amount of time has passed, and the transparent parts have turned yellow (see photo 7). Therefore, I marked it as "has noticeable dirt and scratches." There are no malfunctions such as water leaks, and the usability is unchanged. I'm still actively using the 1.5L one. Please consider. - Brand: GEIGERRIG - Type: Hydration Pack - Capacity: With maximum fill line - Accessories: Tube and valve - Function: Manual pump type Capacity...3L