Insulated bottle made of 100% non-toxic BPA-free plastics & durable food-grade 18/8 stainless steel. The unique ThermoArmour technology inside this insulated water bottle keeps beverage cold up to 48 hours and hot up to 24 hours. With our powder-coat technology & Wide mouth your bottle is easy for gripping, cleaning and ice-filling. with straw lid and flex cap, the flex cap is perfect for the beach,camping and hiking, while the straw lid is suitable for cycling and road trip.