It features a vacuum-insulated, double-walled structure like a thermos, providing excellent cold and heat retention. It's useful year-round, whether you're carrying it cold as a heatstroke countermeasure or filling it with hot water to warm your hands. It's easy to carry and can be taken out and used immediately when you're on the go. It comes with a silicone case, making it easy to clean. - Model Name: eco stick - Color: Pink - Features: Easy-to-carry handle - Material: Stainless steel Thank you for viewing.