ADVERTISEMENTProtein RangeCoffee powerhouse Starbucks added protein lattes and protein cold foams to its menus last year, and this year rolled out ready-to-drink protein coffee beverages online and to grocery and convenience stores. Javvy also sells protein refreshers, coffee syrups and creamers. Venture capital firms including Amberstone Ventures, Platinum Mile Ventures and Selva Ventures have invested in Javvy. ADVERTISEMENTThe company said last month that it had reached approximately one in every 44 US households, with one Javvy Protein Coffee sold every seven to eight seconds. One bag of Javvy's protein coffee, which serves 20, sells for $34.95, according to its website.