LifeStraw Peak Series Solo Water Filter vs SteriPen Adventurer Opti
Weight and specs compared for 2026 — and which one to choose.
0.2 micron microfilter, 3L/min flow, 2000L capacity. Screws onto 28mm bottles or use as straw. Removes 99.999999% bacteria.
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LifeStraw Peak Series Solo Water Filter vs SteriPen Adventurer Opti: which should you buy?
If saving weight is your priority, the LifeStraw Peak Series Solo Water Filter wins — at 48 g it is 42 g (47%) lighter than the SteriPen Adventurer Opti (90 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.