Trail runners carry a soft water flask because it shrinks as you drink, so it stops sloshing in a vest pocket halfway through the run. This one has a TPU body and a silicone mouthpiece you bite and squeeze, with a clear dust cover on a tether. The 150 ml flask suits a pocket, the 250 ml slips into a waist bag and the 500 ml fits a hydration pack. A separate drinking straw is also offered for the two larger sizes. It is part of our Sports & Outdoor collection.
Key features
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Squeeze and sip – a light squeeze on the TPU body sends water through the silicone mouthpiece
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Shrinks as you drink – empties flat, so it rolls into a pocket once finished
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Three sizes – 150 ml at 22 g, 250 ml at 25 g, and 500 ml at 30 g
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Dust cover – a tethered cap keeps grit off the mouthpiece on dusty trails
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Straw add-on – a long straw option makes it easier to drink from a pack without lifting the flask
Specifications
| Item |
Collapsible soft flask |
| Body |
TPU |
| Mouthpiece |
Silicone |
| Cover |
PP dust cover |
| 150 ml |
16 x 7 cm, 22 g (5.07 oz capacity) |
| 250 ml |
23 x 7 cm, 25 g (8.45 oz capacity) |
| 500 ml |
27 x 9 cm, 30 g (16.9 oz capacity) |
| Colors |
Dark blue, light blue, pink |
| Separate option |
Drinking straw for 250 or 500 ml |
Frequently asked questions
Which soft water flask size do I need for running?
Choose by where it rides. The 150 ml soft water flask fits a pocket, 250 ml suits a waist bag, and 500 ml goes in a hydration pack, as shown on photo 5.
Can I put hot water or sports drinks in the soft flask?
Use cool water, and rinse straight after any sports drink. No heat rating is published for this soft water flask, so keep it away from hot liquids, and let it dry open.
Does the straw option include a flask?
No. That option is the drinking straw alone, for 250 or 500 ml soft water flasks, so add it alongside a flask if you need both.
Will the soft water flask leak in my bag?
The bite mouthpiece opens under pressure, so a tight, packed bag can squeeze out drips. Close the dust cover and test this soft water flask at home before you rely on it.
Buying more than one, ordering again, or shopping for a gift or event? Email cs@elysianoble.com with the product link for a personal quote.
Shipping and returns – see our Shipping Policy and Refund Policy for delivery times and how returns work.