Among the latest entrants in the energy industry’s caffeine race is a pocket-size squeeze bottle called Mio Energy.

Each half-teaspoon serving of Mio, which is sold by Kraft Foods, releases 60 milligrams of caffeine in a beverage, the amount in a six-ounce cup of coffee, the company says. But one size of the bottle, which users can repeatedly squeeze, contains 18 servings, or 1,060 milligrams, of caffeine — more than enough, health specialists say, to sicken children and some adults, and even send some of them to the hospital.

Several countries are reining in sales of energy drinks, pointing to the risks of excessive caffeine consumption by teenagers and even some adults. By year’s end, Canada will cap caffeine levels in products like Monster Energy, Red Bull and Rockstar. Also countries like Mexico, France and India have or are considering steps including taxing the drinks more heavily to discourage their use.

As consumption of energy drinks soars in the United States, some members of Congress have called for a review of the industry, and the New York State attorney general is investigating the practices of several producers. However, critics say the Food and Drug Administration has allowed the drinks to languish in a regulatory gray area and does not require companies to disclose how much caffeine their products contain.