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Vapur Eclipse 1L — Specs & Analysis
Manufacturer specifications, compared against every other hydration in our database. We do not test gear in the field — we measure, verify, and compare.
The Vapur Eclipse 1L is a collapsible, foldable water bottle that weighs just 37 grams and rolls up to the size of a small snack bar when empty. It is an ultralight backup water vessel for bikepackers who need flexible capacity.
The Vapur Eclipse solves a problem that every bikepacker encounters: sometimes you need more water capacity than your primary bottles provide, but carrying extra rigid bottles full-time wastes valuable space. The Eclipse folds flat when empty and takes up virtually no room in a pocket or bag, then expands to a full liter when you need it.
Construction uses a three-ply nylon and polyethylene laminate that is remarkably durable for its weight. The material is BPA-free, taste-neutral, and dishwasher safe. Despite its flexible construction, the Eclipse can stand upright when filled and feels secure in a bottle cage with an adapter, though it is most practical carried in a bag or pocket.
The SuperCap spout opens with a simple flip and provides a good flow rate for drinking on the move. It seals completely when closed and does not leak, even when the bottle is squeezed in a packed bag. The integrated carabiner clip lets you hang the bottle from a pack strap or bag loop for quick access.
At just 37 grams and essentially zero packed volume when empty, the Eclipse is the ultimate backup water container. Many bikepackers carry one or two as emergency reserves for dry stretches, filling them only when they know the next water source is far away and emptying them once the risk has passed.
The flexible material does pick up flavors from drink mixes more readily than rigid plastic or metal bottles. A thorough wash with baking soda between uses helps, but if you exclusively use the Eclipse for plain water, this is a non-issue.
For bikepackers who want the security of extra water capacity without the permanent space and weight commitment, the Vapur Eclipse is the lightest and most packable solution available.
Who Is the Vapur Eclipse 1L Best For?
Bikepackers who want a nearly weightless backup water bottle for dry stretches and variable capacity needs. If that describes your riding style, the Eclipse 1L should be at the top of your shortlist. It sits in the Hydration category alongside 15 other products we track.
How It Compares
At 37g and $13, the Eclipse 1L is the lightest option in this category. It's also the most affordable option available.
The price-to-weight ratio comes in at $35 per 100g — a premium price point, but you're paying for quality, materials, and design that justify the investment for serious bikepackers.
What We Like
- +Incredibly light at 37 grams
- +Rolls up to almost nothing when empty
- +Durable three-ply construction resists punctures
- +Integrated carabiner clip for easy attachment
Watch Out For
- −Cannot stand upright as stably as rigid bottles
- −Absorbs flavors from drink mixes over time
- −Not compatible with standard bottle cages without adapter
The Bottom Line
We haven't scored the Vapur Eclipse 1L, and neither has anyone else we can cite. It's here for its verified specifications and dimensions, which is what the fit tools run on — a score is an editorial judgement, and we don't hand one out until someone has a basis for it. What this page can tell you is measured: 37g, $13, and how both sit against every other hydration product we track.
The price and weight above have not yet been checked against the manufacturer's own page. We are working through the catalogue and saying so as we go, rather than letting silence imply otherwise.
Specifications and dimensions come from the sources listed above. Where a page draws on first-hand riding, it says so.
How it compares
Against the 16 hydration products we hold published specs for.
At 37g the Eclipse 1L is the lightest in the category we track, against a category median of 116g.
At $13 it undercuts 15 of 15 of them, against a median of $45. That works out at $35 per 100g — above the $35 median for hydration products.
Weight and price come from published specifications. Cost per 100g is a blunt measure — it rewards light gear and says nothing about durability or whether the thing works — so treat it as one input, not a verdict.
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