There are many double walled vacuum sealed water bottles on the market today and most of them are really nice. The Hydro Flask is arguably the best out there. It is designed to keep your cold drinks cold for up to 24 hours and hot drinks hot for up to 12 hours and this bottle doesn’t let you down.
Hydro Flask‘s insulated water bottles are made of high quality food grade 18/8 stainless steel. The bottles have no liner (like most aluminum bottles) and are BPA free. Unlike plastic water bottles or single wall stainless bottles, Hydro Flask will keep your beverage of choice at your preferred temperature for hours, whether you choose hot, cold or room temperature liquids. All Hydro Flask products feature a lifetime warranty and are double wall vacuum insulated.
They are designed to be lightweight, making them great for long hikes, days on the beach, golf, long road trips or everyday office use. Even when filled with ice, the exterior of your Hydro Flask will never leave a puddle on your desk, drip on your shirt, or sweat in your bag.
I filled my Hydro Flask with ice water to the top and let it sit out in the warm California sun for a full 6 hours. With 6 hours of direct sunlight on a black water bottle the exterior was almost too hot to touch. When I opened the bottle there was still a lot of ice to my surprise and delight! Hydro Flask rocks and if anyone tells you different it’s because they haven’t used one themselves!