Keep Hydrated all day long with the Avanti Fluid Double Wall Insulated Water Bottles. Ideal for work, sport, at the gym, in your car, at the beach or camping, the generous 500ml capacity is designed to suit all your hydration needs. Featuring double wall Aircore Technology, the vacuum insulation maintains the internal temperature of the bottle and keeps drinks cold for up to 24 hours and hot for up to 12 hours regardless of the temperature outside. Constructed from durable, high-grade 18/8 stainless steel, for both the inside and outer walls, these reusable bottles are built to last. Condensation free, the leak-proof screw top lid with its silicone seal is airtight and eliminates accidental spills, so taking these bottles on the go is easy and mess free.