Oikos Protein Fuel, a line of ready-to-drink caffeinated dairy beverages, is the latest offering from Danone. The 190-calorie drinks -- which come in vanilla, mixed berry, peach and strawberry banana flavors -- contain 100 mg of caffeine and 25 grams of protein.

Kafina Energy shots energize people with organic adaptogenic herbs instead of overloading them with caffeine, says co-founder Heather Beach. The company has patented its formula, as it's the first to self-preserve and provide low-calorie, low-caffeine, plant-based energy, Beach adds.

Caribou Coffee unveiled its new line of energy drinks called Caribou Bou-sted Caffeinated beverages that include ready-to-drink sparkling waters and beverages. The caffeinated sparkling waters come in grapefruit and mixed berry, while the sparkling beverages -- which combine carbonated water, fruit infusions and caffeine -- are available in dragon fruit and passion fruit orange guava flavors

Drinking three or more caffeinated drinks a day has been linked to a higher risk of migraines that day, according to a study published in The American Journal of Medicine. But drinking two or fewer caffeinated drinks was not associated with migraines, except in people who rarely consumed any caffeine, researchers said.