The Seeker 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. Ultra-light water storage solution for camping, hiking, or any backcountry adventure The flexible design makes it so light and compact, you'll forget it's in your pack Attach to your pack or hang with top and side tie-downs External capacity gauge allows you to track your hydration intake or measure out the contents The 42mm screw cap makes it easy to fill and the rigid rim allows for easy pouring Backcountry water filter compatible, the Katadyn BeFree Filter (sold separately) screws on to the top allowing you to filter more water at camp Made of ultra-durable, abrasion resistant TPU and RF welded seams for superior durability and elasticity Wide working temperature range (can be frozen - max temp 60 degrees C / 140 degrees F) Safe and reliable, 100% BPA and PVC free Frequently Asked Questions What is the best use for the Seeker? The Seeker is a great ultra-light water storage solution for camping, hiking, or any backcountry adventure. Is the Seeker easy to clean? Yes! To clean a Seeker, you can run it through the dishwasher on the top shelf. Alternatively, clean it with warm, soapy water and a bottle brush, or use Bottle Bright to even more thoroughly clean the product.