A row of silver-colored tanks shimmer under the spotlight. You could easily mistake this for a microbrewery, but these cylindrical steel bioreactors don’t contain a hoppy IPA beer. They contain the future of milk. The $40-million Californian-based startup TurtleTree is banking on a future where we are no longer reliant on pastures filled with dairy cows to enjoy our favorite latte—our next pint of milk could come from a lab, as another part of a growing industry in cell-based foods.