Hydrapak Seeker water bladders have the right thread pattern to attach Katadyn® BeFree™ Filters and are a durable choice for carrying larger water volumes. 

The Seeker™ 2L is HydraPak’s ultra-light, durable water storage bag for camping, backpacking, you name it. It collapses down to the size of a fist, and is easy to pour and transport. The wide opening is easy to fill, and the leakproof, tethered cap won't get lost. The included cap and tether can be left at home to reduce weight when used with a BeFree filter.

Hydrapak Seeker water bladders have the right thread pattern to attach Katadyn® BeFree™ Filters and are a durable choice for carrying larger water volumes.

The Seeker™ 3 L is HydraPak’s ultra-light, durable water storage bag for long haul excursions. It collapses down to the size of a fist, and is easy to pour and transport. The wide opening is easy to fill, and the leakproof, tethered cap won't get lost. The included cap and tether can be left at home to reduce weight when used with a BeFree filter.