This is your friendly reminder to drink water today. Do it, go into your kitchen and grab a glass. When you're on the go, the Thule Uptake 4L Hydration Pack will help you to stay hydrated. Its 2.5 Liter reservoir is perfect for runs and other activities where you can't afford to stop for your lifesaving liquids. Reflective details help you stay seen in low light, 4 Liters of storage space is just enough for an extra layer and a snack, and an easy access exterior phone pocket makes changing your workout jams easy. You should be finished with your water by now, good. The Thule Uptake 4L Hydration Pack wants you to stay hydrated, efficiently.