1.FESTIVAL ESSENTIAL With eyecatching bright colors and a lightweight, waterproof design, this rave hydration pack is perfect for those who want to stand out at festivals, parties, or carnivals. It's an ideal companion for outdoor activities. 2.KEEP COOLING The rave hydration pack features a thick insulated layer and a thermal compartment that keeps your liquids cold or hot for up to 4 hours. A separate inner compartment enhances insulation while ensuring drywet separation for added convenience. 3.BPAFree 2L HYDRATION BLADDER Includes a 2liter leakproof water bladder with a soft, highflow bite valve for easy drinking. Simply pull out the mouthpiece, bite to drink, and push it back to seal automatically. Our water bladder is pressuretested and leakproof, ensuring worry use during music festivals, cycling, running, hiking, and all outdoor adventures. 4.HOW TO DRINK FREELY Note that the bite valve is the 'bite and suck valve'. First, pull the valve in the 'on' position. Then put it in the mouth, bite the groove gently with your teeth, sucking the valve at the same time. It will pop open and fluid flows ly.