REI Garage offers the CamelBak Flash Flo LR 1.5 Liter Hydration Pack in Black or Lime Punch/Silver for $29.73. Opt for in-store pickup to avoid the $5.99 shipping fee. That's the lowest price we could find by $19. It features essentials pocket, reflective accents, CamelClip bite valve, and an adjustable waist strap.