Swiss Peak Vacuum Flask The Swiss Peak Vacuum Flask is a double-walled bottle with a capacity of 500ml. The bottle is a thermal insulation bottle your drink, such as coffee, keep a good temperature. The Swiss Peak Vacuum Flask is available in one color, gray. The bottle cap can also be used as a cup for your drink. You can easily close the bottle by pushing the cap. You can print your own design or logo on the bottle so the bottle can be used as a promotional tool inside or outside your company. You can print your design or logo up to five colors. Also, you can engrave your logo.