• Insulated Flask with Speaker: The VSSL 8 oz. insulated flask with speaker is double-walled with vacuum-sealed insulation, weatherproof and the speaker delivers 5 hours of playtime • Outstanding Insulation: Double-walled, vacuum-sealed insulation guarantees that all 8 fluid ounces maintain the perfect temperature; 10 hours cold and 5 hours for hot liquids • Weatherproof Speaker: True Wireless Speaqua Speaker end cap delivers 5 hrs of playtime & pairs with up to 5 devices; rated IP65, includes battery charge indicator light & charging cable • Double Port Drinking Cap: Our double port, leakproof drinking cap doubles as a carabiner; split flip carabiner clips easily with a secure magnetic closure when you need it & folds flat when you don't • VSSL Products Built to Last: Made from premium-grade aluminum, the VSSL Insulated Flask does not retain flavors or smells, will withstand weather, wear without rusting, and will last for decades