It's just water weight... Well, water weight adds up quick. And even an empty water bottle takes up space in your pack. Take the Sea to Summit Watercell X 20L Reservoir with you on your next lightweight adventure. You'll save weight on the trip but still be able to fill up at the campsite.
Food-grade TPU
Filled – 20.2 x 14 x 6.2 in / 51 x 37 x 16 cm
Capacity – 20 L / 676 oz
Weight – 11.8 oz / 335 g
BPA-free
PVC-free
Taste-free
Flexible
Durable
Strong, Streamlined Grab Handles Double as Lash Points
Low-profile Fill Handle for One-handed Manageability
Abrasion-resistant
Collapsible