Many of our loyal Naked® customers have been asking for us to provide accessories that can help them achieve their personal goals. We decided to respond by first introducing our state-of-the-art collapsible flasks. Hope you like them!


Our flasks come in two sizes - 350 ml and 500 ml - and feature a soft, high flow bite valve so you don't lose a drop and a wide mouth cap for easy access and cleaning. Made of tough thermoplastic polyurethane (tpu), the flasks are bpa, phthalate and pvc free, and made from recyclable materials. They also feature a printed volume scale (in ml and oz) so you can monitor your fuel mix and consumption rate. Most importantly, they shrink in size as you use them to save space. 
Taking care...

Take care

For best results, hand wash the flask and cap with mild detergent in warm water prior to using for the first and do the same thing before each use. Do not wash in dishwasher. Before using, make sure to not cross thread cap while screwing on or over tighten cap. It's a good idea to occasionally lubricate the cap and flask threads with with small amount of food grade cooking oil; be sure to wipe excess. When not in use keep cap loosely tightened on flask.

Run. Free.