0 sugar per can. Zero sugar. Monster Energy Blend: Taurine, l-carnitine, caffeine, inositol. Caffeine from All Sources: 150 mg per can. Monster energy ultra watermelon is low in calories. Monster Energy Blend: Taurine, l-carnitine, caffeine, inositol. Caffeine from All Sources: 150 mg per can. Zero sugar + taurine + L-carnitine. Under the firework lit night sky, you've got your crush by your side, With good music and better friends, it's the best summer ever. Ultra Watermelon is summer-time in a can so you can enjoy it anytime. Zero sugar, easy-drinking refreshing flavor with the explosive Monster energy blend to light-up those hot summer nights. Unleash the ultra beast! monsterenergy.com. Made in Mexico.