Grayl UltraPress Purifier vs Katadyn BeFree AC Bottle 0.5L
Weight and specs compared for 2026 — and which one to choose.
Press-style 16.9oz bottle purifier using electroadsorption and activated carbon; removes viruses, bacteria and protozoa.
Full details →Ultralight collapsible water filter bottle with activated carbon. Removes tannins and improves taste. Fits running vests and ultralight daypacks
Full details →HikeLoad is reader-supported. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Learn more.
Grayl UltraPress Purifier vs Katadyn BeFree AC Bottle 0.5L: which should you buy?
If saving weight is your priority, the Katadyn BeFree AC Bottle 0.5L wins — at 72 g it is 237 g (77%) lighter than the Grayl UltraPress Purifier (309 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.