Convenient Handle: Featuring an ergonomic handle design that rotates as needed, allowing for comfortable grip and ease of transport when pivoting from one daily activity to another. Cupholder Friendly: Tapered shape is ideal for taking in the car or on daily adventures. Double Wall Insulation: Keeps beverages cold or hot for hours. Durable: Made of premium 18/8 stainless steel, and comes with a silicone boot to soften landings and enhance stability. Limited Lifetime Warranty & Patent Pending