Amazon.com has an Outdoor Products Well Spring 2-Liter Hydration Pack for $21.99 with Free Shipping on orders over $25.
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- Lightweight day pack, measures 17 x 7.5 inches n
- Designed for short day trips, with a capacity of 220 cubic inches n
- Comes with a 2-liter Cyclone bladder n
- Deluxe padded back with Air Way cooling system for comfort n
- Lifetime guarantee on workmanship and materials