Grayl GeoPress vs Katadyn Gravity BeFree 3.0L
Weight and specs compared for 2026 — and which one to choose.
Water purifier bottle at 450g. 710ml capacity with advanced filtration technology for pathogen and chemical removal.
Lightweight gravity filter system at 6.7oz. Ideal for group camping and basecamps.
Building a pack? Add either one to your HikeLoad list, or drop its weight into the base weight calculator, and see what it does to your total weight.
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Grayl GeoPress vs Katadyn Gravity BeFree 3.0L: which should you buy?
If saving weight is your priority, the Katadyn Gravity BeFree 3.0L wins — at 192 g it is 258 g (57%) lighter than the Grayl GeoPress (450 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.
See where both rank against everything else in this category on the lightest hygiene page, or browse the full gear weight database.