Grayl GeoPress Purifier vs Platypus GravityWorks 4L

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

Platypus GravityWorks 4L is the lighter option — 287 g lighter than the Grayl GeoPress Purifier (64% less weight). If grams matter to you, that is the one to beat.

Spec	Grayl GeoPress Purifier	Platypus GravityWorks 4L
Weight	450 g · 0.450 kg · 0.99 lb	163 g · 0.163 kg · 0.36 lb
Brand	Grayl	Platypus
Category	Hygiene	Hygiene

Grayl GeoPress Purifier

450 g

Press-style 24oz bottle that purifies virus, bacteria and protozoa from any freshwater source in about eight seconds.

Check price Full details →

Platypus GravityWorks 4L

163 g

Gravity-fed water filter system for camp use.

Full details →

Grayl GeoPress Purifier vs Platypus GravityWorks 4L: which should you buy?

If saving weight is your priority, the Platypus GravityWorks 4L wins — at 163 g it is 287 g (64%) lighter than the Grayl GeoPress Purifier (450 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.

More hygiene comparisons

Grayl GeoPress Purifier vs PackTowl UltraLite Face Towel Grayl GeoPress Purifier vs CNOC Vecto 3L Water Container Grayl GeoPress Purifier vs Sawyer Mini Water Filter Grayl GeoPress Purifier vs Katadyn BeFree 1L Grayl GeoPress Purifier vs Sawyer Squeeze Filter Grayl GeoPress Purifier vs Sea to Summit Trek and Travel Liquid Hand Wash