Caffeine From All Sources: 80 mg per 8 fl oz serving (160 mg per can). Monster Mule: Inspired by the famous bar call that includes the Russian capitol, Monster Mule is no ordinary energy drink. With complex flavor highlighted by spicy/sweet ginger and backed up with zesty line notes the taste is guaranteed to satisfy. Stir in our monster energy blend for a kick in the pants sure to get you moving morning or night! Available for a limited time only in a collectable copper style can. Grab one soon, because when they're gone that's it and you'll be kicking yourself in the a**! Unleash the beast! monsterenergy.com. Facebook. Instagram. Twitter. Youtube.