Katadyn BeFree AC Bottle 0.5L vs Katadyn Gravity BeFree 3.0L
Weight and specs compared for 2026 — and which one to choose.
Ultralight collapsible water filter bottle with activated carbon. Removes tannins and improves taste. Fits running vests and ultralight daypacks
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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Katadyn BeFree AC Bottle 0.5L vs Katadyn Gravity BeFree 3.0L: which should you buy?
If saving weight is your priority, the Katadyn BeFree AC Bottle 0.5L wins — at 72 g it is 120 g (63%) lighter than the Katadyn Gravity BeFree 3.0L (192 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.