Prox

Prox is an Austin, Texas-based performance beverage brand making sparkling "hybrid" protein energy drinks. Each 12 oz can delivers 20g protein (collagen plus whey), 200mg natural caffeine from green coffee beans and green tea leaves, 90 calories and zero sugar, and is gluten- and lactose-free. Positioned as sparkling rather than milky, the line is sold direct-to-consumer in single-flavor and variety 12-packs plus a sample pack, with subscriptions, and is also available on Amazon. Flavors include Guava Pom, Orange Dream and Tropical Rush. Made in the USA.