CHAN Thermoflask The CHAN Thermoflask is a stainless steel, double-walled bottle that keeps your hot beverage such as coffee or tea fine on temperature for a long time. This makes it easy to take your beverage for example, a business meeting or picnic. The CHAN Thermos flask is available in 8 different colors The Thermoflask has a screw cap to close the bottle. You can print your own design or logo on the thermosflask. The logo can be printed in up to two colors. You can also engrave your design or logo. The CHAN Thermoflask is BPA free production.