Vacuum insulated tumblers have skyrocketed in promo product popularity in years due to technology that provides superior insulating properties. The key to this high-performance that keeps drinks cold (or hot) longer than traditional double-wall drinkware is a vacuum seal. This process essentially removes all air and other matter from between the interior and exterior walls of the tumbler. Creating a vacuum chamber in the middle of the tumbler stops all heat transfer by either conduction, convection, or radiation. (1)
Take our Glacial Diamonds Tumbler for example. This stainless steel tumbler is
constructed with a hole left in the bottom of the outer wall. The air is then sucked out of the space between the walls and as it is sucked out a glass bead is then wedged into the hole and heated to create an airtight seal. Because there are no air molecules between the tumbler walls to transfer heat or cold, the beverage maintains its temperature for hours longer.
Here it is in action:
Another great example is our Koozie® Triple Vacuum Tumbler. Made of double-wall 18/8 stainless steel, this combination can cooler/tumbler keeps your hands and your drinks at the right temperature for up to 12 hours using vacuum seal technology. The vacuum stops conduction and the inner lining stops heat radiation between the two layers of the double-wall. You can fit 12 oz. (or 16 oz.) cans or bottles for use as a can cooler, or drop in the patent-pending sip-through lid to use it as a tumbler. All three uses are insulated by the central vacuum chamber.
BIC Graphic NA has brought vacuum-seal technology to dozens of products from can coolers to wine glasses and even growlers! Check out all the options at bicgraphic.com.