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Katadyn BeFree AC Bottle 0.5L vs SteriPen Adventurer Opti

Weight and specs compared for 2026 — and which one to choose.

No winner on weight yet. The recorded weights have not both been verified on the same basis. Size, included parts and single-item versus pair weights can differ. Check the linked sources before choosing a replacement.

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Spec Katadyn BeFree AC Bottle 0.5L SteriPen Adventurer Opti
Weight 72 g · 0.072 kg · 0.16 lb 90 g · 0.090 kg · 0.20 lb
Brand Katadyn SteriPen
Category Hygiene Hygiene
Katadyn BeFree AC Bottle 0.5L
72 g

Ultralight collapsible water filter bottle with activated carbon. Removes tannins and improves taste. Fits running vests and ultralight daypacks

See it in your base weight → Full details →
SteriPen Adventurer Opti
90 g

UV water purifier. Purifies 1L in 90 seconds.

See it in your base weight → Full details →

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Katadyn BeFree AC Bottle 0.5L vs SteriPen Adventurer Opti: which should you buy?

The listed weights alone are not enough to choose between these products. Confirm the size, included parts and weight basis against each source; choose equipment for the function and fit you need.

See where both rank against everything else in this category on the lightest hygiene page, or browse the full gear weight database.

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