Hydration packs are overkill when you're only going to be out for a short run or hike. For this you need a small capacity hydration belt like the Nathan Speed 2R Auto-Cant with two 8 ounce bottles. “Auto Cant” refers to the small disk located between the two bottle holsters, which allows the bottles to be positioned at different angles depending on the shape of your waist for a custom fit. The bottles come with race caps, which is a high-flow, one-way valve to make drinking easier – all you have to do is squeeze it into your mouth. Removing a bottle from the holster and putting it back is quick and easy and it has useful pockets.