Hydrapak designed these flasks as superlight collapsible hydration alternatives to regular hard bottles. The SkyFlask is great for runners, riders and backpackers because it has a locking cap and an integrated handstrap. We offer them with a stubby straw silicone drinking tube so when holstered on a shoulder strap you can drink directly from the flask, no need to fiddle around with removing and re-holstering them when you need a quick drink. 500mL (17oz) capacity, 100% BPA and PVC free Made of flexible TPU with welded seams, collapses down when not in use Twist locking cap is a must for bike/backpacking and keeps the system leakproof 42mm opening for easy adding of ice cubes and hydration mixes and works with our 42mm Filtration Cap Included straw drinking tube (cuttable and removable) makes for easy "hands free" hydration Adjustable strap keeps it where you want it when you're running with it in hand Feathery 64g for the flask with drinking tube Risk-Free Purchase: if you're not satisfied, we'll send you a return label and exchange it for free!
