HydraPak UltraFlask Speed 600ml vs LifeStraw Peak Solo
Weight and specs compared for 2026 — and which one to choose.
Soft-sided water bottle at 2 oz (57g) designed for running hydration vests and ultralight backpacking with collapsible design.
Full details →Ultracompact water filter weighing just 1.7oz. Uses 0.2 micron membrane to remove 99.999999% bacteria and filters up to 2000 liters with 3L/min flow.
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HydraPak UltraFlask Speed 600ml vs LifeStraw Peak Solo: which should you buy?
If saving weight is your priority, the LifeStraw Peak Solo wins — at 48 g it is 9 g (16%) 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.