Grayl UltraPress Purifier vs Katadyn Gravity BeFree 3.0L
Weight and specs compared for 2026 — and which one to choose.
Press-style 16.9oz bottle purifier using electroadsorption and activated carbon; removes viruses, bacteria and protozoa.
Lightweight gravity filter system at 6.7oz. Ideal for group camping and basecamps.
Building a pack? Add either one to your HikeLoad list, or drop its weight into the base weight calculator, and see what it does to your total weight.
HikeLoad is reader-supported. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Learn more.
Grayl UltraPress Purifier vs Katadyn Gravity BeFree 3.0L: which should you buy?
If saving weight is your priority, the Katadyn Gravity BeFree 3.0L wins — at 192 g it is 162 g (46%) lighter than the Grayl UltraPress Purifier (354 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.