Hydro Flask insulated water bottle is made for your next adventures. Whether it is enjoying the outdoor lifestyle, hitting the gym, or for everyday use, taking a sip will bring you joy. Their unique double wall vacuum insulation protects temperature incredibly well. Keeps beverages cold up to 24 hours and hot up to 12 hours so cold drinks stay icy cold and hot drinks stay piping hot so you can stay refreshed for any adventure. Made with 18/8 pro-grade stainless steel (higher grade than industry standard 304 which is stronger and less corrosive), you're ensured pure taste with no flavor transfer, and guaranteed its extreme durability. Using their proprietary powder coat technique makes it slip-free, lasting color, and dishwasher safe. Lifetime Warranty