The great outdoors just got greater. The Seeker 2L is HydraPak&';s ultra-light, durable water storage system for camping, backpacking, you name it. It collapses down to the size of a fist, attaches to your pack or hangs from a tree. You can freeze it to use as an ice pack or fill it with hot water to keep you warm. SpecsFor 2 L / 70 fl oz Capacity 2 L / 70 fl oz Dimensions 320 mm x 130 mm / 12.6 in x 5.1 in Weight 76 g / 2.7 oz Material TPU, PP, Nylon for 3 L / 100 fl oz Capacity 3 L / 100 fl oz Dimensions 370 mm x 140 mm / 14.6 in x 5.5 in Weight 92 g / 3.2 oz Material TPU, PP, Nylon For 4 L / 140 fl oz Capacity 4 L / 140 fl oz Dimensions 420 mm x 150 mm / 16.5 in x 5.9 in Weight 104 g / 3.7 oz Material TPU, PP, Nylon Features Low-profile, durable, coated handle for easy pouring and carrying - tear & weather resistant Leakproof 42mm screw cap with tear resistant, removable tether Compatible with 42mm threaded backcountry water filters, the KatadynA(R) BeFree(TM) Filter screws on to the top allowing you to filter more water at camp Large 42mm opening makes it easy to fill and tethered screw cap prevents cap from getting lost - creates a convenient carry loop for holding the Seeker upright when filling Two load bearing side lash points, for attaching to your pack or setting up a gravity feed External capacity gauge allows you to track your hydration intake or measure out the contents Versatile design, can be used as a hydration reservoir or paired with a Plug-N-Play Cap and 28mm filter adapter Made of ultra-durable, abrasion resistant TPU & RF welded seams for superior durability and elasticity Can be frozen or filled with hot water (max temp 60Adeg C / 140Adeg F) Safe and reliable, 100% BPA & PVC free