Wave Flask The Wave Flask is a double-walled thermos flask with an elegant design. The Wave Flask has won the Red Dot Design Award with its elegant design. The bottle is ideal to take with you when you have to travel somewhere. The Wave Flask has a capacity of 700ml. The Wave Flask is designed to keep your beverages such as coffee the right temperature for a longer time. You can print your own design or logo on the Wave Flask so you can use it as a promotional tool. You can print your design or logo in up to 4 colors. Also, you can engrave your logo. The bottle is available in different colors. The Wave Flask has a mug on both ends that you can use. The Wave Flask is BPA-free produced.