Reservoirs · two liters
EVA or reinforced TPU — two two-liter bladders that both say what they are made of.
Naming the film is unusual on this shelf and both of these do it, which is the reason for the pairing. One goes further and publishes how the seams are joined; the other goes further and publishes how thick the film is. Neither publishes an empty weight, and neither publishes a hose bore — two columns blank on both sides, and blank across all nine reservoirs in this hub.
| Compared on | 2-liter EVA hydration reservoir | 2-liter TPU reservoir |
|---|---|---|
| Capacity | 2 liters — stated | 2 liters — stated |
| Opening type | Screw cap, described by the maker as a large fill port — stated | Two openings — a round fill opening for filling and a slide opening for cleaning |
| Hose internal diameter | Not published — the hose is stated as 100 cm (39.4 in) long and detachable, which is a length rather than a bore | Not published — the hose is stated as an extra length of 100 cm (39.4 in) |
| Bite valve | Not published — a soft mouthpiece is stated, and the maker does not call it a bite valve | A bite valve — stated |
| Shut-off | An auto-lock system — stated | Not published — the leak-proof claim is made for the click coupling, not for a valve lock |
| Quick-disconnect fitting | Not published — the hose is stated detachable, without naming a coupling | A leak-proof click system, stated to separate the hose from the reservoir |
| Film material | EVA — stated BPA-free, flexible and pressure-resistant | Reinforced TPU at 0.4 mm (0.02 in) rather than 0.3 mm (0.01 in) — stated, BPA-free and LFGB-certified |
| Seam construction | Double-sided EVA heat sealing without adhesive, with an internal silicone seal and reinforced joints — stated | Not published |
| Empty weight | Not published | Not published |
| Listed on amazon.com | No | No |
Each tick belongs to its own line and nothing more. The row of ticks is not a score: the two verdicts underneath settle the page, because these two answer different questions on the trail.
No amazon.com listing was found for this one. We hold references for other markets but none for the United States, so it may not be buyable here — which is the first thing to weigh against anything below.
The Geroony is the reservoir that publishes how it is put together: double-sided EVA heat sealing with no adhesive, an internal silicone seal and reinforced joints between hose, spout and reservoir. It adds an auto-lock system the other one does not state, and it never calls its mouthpiece a bite valve.
No amazon.com listing was found for this one. We hold references for other markets but none for the United States, so it may not be buyable here — which is the first thing to weigh against anything below.
The SASMO Sports publishes the only film thickness on this shelf, 0.4 mm (0.02 in) of reinforced TPU rather than 0.3, and it is the one with two separate openings — round to fill, sliding to clean — plus a stated bite valve and a click coupling. How the film is joined at the seam is the line it leaves empty.
Those are answers to two different questions and this page does not convert one into the other. SASMO Sports publishes a thickness and no seam; Geroony publishes a seam and no thickness. Both are stated by their makers, and neither figure has a test named behind it in either listing.
It is the rule rather than the exception here. Eight of the nine reservoirs in this hub say nothing about weight, and the one that does is compared on another page. Several of these listings use the word ultralight without a figure anywhere near it.
2 L reservoir · screw cap · 100 cm (39.4 in) detachable hose · heat-sealed EVA · 36 × 17 cm (14.2 × 6.7 in)
A 2 liter EVA reservoir that publishes something almost nobody on this shelf does — how its seams are made — along with its outside dimensions, an auto-lock mouthpiece and a 100 cm (39.4 in) hose.
Best for: A pack with a known reservoir sleeve, where the seam construction matters more than a wide opening does.
2 L reservoir · round fill opening and slide opening · 0.4 mm (0.02 in) TPU · bite valve · click coupling
A 2 liter reservoir with two separate openings — one round for filling, one sliding for cleaning — and the only film thickness published on this shelf, given as 0.4 mm (0.02 in) rather than 0.3 mm (0.01 in).
Best for: A reservoir that has to be cleaned after every use and reconnected without pulling the hose out of the pack.
Prices in these summaries were read on the dates each review gives. The live figure sits beside every product.
