If you are wanting to get a hydration pack, here is a pretty nice deal. Groupon has this Aduro Sport Hydro-Pro 1.5L Hydration Backpacks for $17.99 (was $49.99).
Product Details:
- Hydration pack with 1.5L bladder
Adjustable shoulder and chest straps
Safety whistle built into the chest strap buckle
Easily accessible outer pockets
Hydration ports on both left and right side
Heat-sealed BPA-free bladder with a bite valve
Reflective accents for added visibility
Dimensions: 11”x3”x17”