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Grayl UltraPress Purifier vs MSR TrailShot

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

MSR TrailShot is the lighter option — 168 g lighter than the Grayl UltraPress Purifier (54% less weight). If grams matter to you, that is the one to beat.
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Spec Grayl UltraPress Purifier MSR TrailShot
Weight 309 g · 0.309 kg · 0.68 lb 141 g · 0.141 kg · 0.31 lb
Brand Grayl MSR
Category Hygiene Hygiene
Grayl UltraPress Purifier
309 g

Press-style 16.9oz bottle purifier using electroadsorption and activated carbon; removes viruses, bacteria and protozoa.

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MSR TrailShot
141 g

Pocket-sized squeezable water filter. Fast flow rate.

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Grayl UltraPress Purifier vs MSR TrailShot: which should you buy?

If saving weight is your priority, the MSR TrailShot wins — at 141 g it is 168 g (54%) 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.

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