Based on the Perk-a-Cola soda bottle cap from Zombies, Revive! features a vintage blue color and a highly detailed rendering of the iconic beverage's logo stamped on our proprietary rubber pad. The laser-etched artwork and fluted bottle cap shape provides solid grip and comfort for long-lasting zombie survival. The 5.7mm of height added by Revive! creates a nearly seamless feel for those looking for big results but prefer less adjustment time.