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HydraPak UltraFlask Speed 600ml vs Katadyn BeFree 1L

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

Katadyn BeFree 1L is the lighter option — 1 g lighter than the HydraPak UltraFlask Speed 600ml (2% less weight). If grams matter to you, that is the one to beat.
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Spec HydraPak UltraFlask Speed 600ml Katadyn BeFree 1L
Weight 57 g · 0.057 kg · 0.13 lb 56 g · 0.056 kg · 0.12 lb
Brand HydraPak Katadyn
Category Hygiene Hygiene
HydraPak UltraFlask Speed 600ml
57 g

Soft-sided water bottle at 2 oz (57g) designed for running hydration vests and ultralight backpacking with collapsible design.

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Katadyn BeFree 1L
56 g

Lightweight collapsible water filter bottle. 1L per minute.

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HydraPak UltraFlask Speed 600ml vs Katadyn BeFree 1L: which should you buy?

If saving weight is your priority, the Katadyn BeFree 1L wins — at 56 g it is 1 g (2%) lighter than the HydraPak UltraFlask Speed 600ml (57 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.

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