ALRI which specializes in workout supplements makes Hypershot, an energy shot with large dose of caffeine. They recommend half a shot per serving.
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Ingredients in ALRI Hypershot
Water, Beta-Alanine, natural and artificial flavors (vigna unguiculata concentrates), caffeine, citric acid, sodium benzoate and potassium sorbate as preservatives, ascorbic acid (vitamin C), artificial color FD&C red, sucralose, gum arabic, glycerol abietate.
Sugar content: Contains no sugar.Compare sugar levels of other drinks
ALRI Hypershot contains 250.00 mgs of caffeine per fluid ounce (845.35mg/100 ml).