FREE Zenergy Chews Caffeine Gum Sample Posted On November 3, 2019 Get a FREE Zenergy Chews Caffeine Gum Sample! To celebrate our launch, we are giving away 300 single packs of Zenergy! All we ask in return is that you give us feedback on the product so we can strive to provide a great experience. Shipped to your door within 5 to 10 business days.