Start getting coffee drinking right. What better way to start your day than a rich, aromatic coffee JoyJolt elevates the experience with double wall insulated coffee mugs that keep hot drinks hot for longer. Start with a pack of 4 coffee mugs in 2 sizes, 13.5 oz, large coffee mug, and 7.4 oz small coffee mug. Don't wait for your coffee to get cold, get double wall coffee glasses for yourself of give a gift for a friend.