With the lightweight SOFT FLASK 150ml/5oz STD 28, stay hydrated and energized on the move as the kilometers start to kick in. Shrinking as you drink to limit bounce, the flask lets you know exactly how much water or gel you have left. Prepare your gels at home and drink whenever you need an extra boost. With extra grip, forget struggling to open sachets and getting your hands all sticky. By preparing your gels in advance, you can also do your bit for the environmenttherell be no need to throw your sticky sachets and tubes on the ground. The intuitive high-flow valve makes drinking easier, so you can stay energized however fast youre running or tired you are. High-flow valve 100% BPA & PVC free 28mm opening Wide working temperature range (frozen - max temp 60°C) TPU & RF welded seams for superior durability, abrasion resistant and elasticity Volume: 0.15 L Weight: 17 g