Collapsible Soft Flask 250 ml large mouth. DESCRIPTION: At less than 50 g, the OTSO Soft Flask is foldable and holds up to 250 ml. It complies with all safety regulations for the consumption of liquids deposited inside. Very easy to use, it is equipped with bite valve. A simple suction ensures a sufficient supply of liquid, every time you want to drink. As it is foldable, it requires very little space and can therefore be stored anywhere in our sports equipment. Durable and leak-proof thanks to its valve system. It is ideal for outdoor sports: trail running, running, climbing, trekking, skiing, mountain biking,... Made with antibacterial TPU BPA and PVC free LFGB certified Super lightweight. Foldable. WASHING RECOMMENDATIONS: Hand wash outside and inside after each use. Wipe dry only on the outside. Store in a dry and cool place.