eNgage is an energy drink company that focuses on keeping gamers' energy levels up during long bouts of gaming. They claim to use only natural ingredients and the drink itself helps improve focus, calms your mind and gives you a boost of energy. But according to their FAQ page, they only deliver to countries in Europe.
Their partnership program is for gamers and streamers. They don’t have an application page nor do they list their sponsorship benefits, but you can inquire about a partnership by contacting them.