Kombucha is a refreshing, tangy drink made of fermented sweet tea. It's become increasingly popular because of its great taste and the digestive benefits it offers derived from the healthy bacteria created during the fermentation process. Mason jars are a perfect vessel to ferment kombucha in because they don't take up much counter space, they fit easily in the fridge, and they can even serve as a drinking glass once the kombucha is ready. The Masontops Kombucha Brewing Lid replaces makeshift DIY solutions, like coffee filters, that are prone to error and need constant replacing. The mesh screen allows for air to easily flow in and out of the jar, without letting in any contaminants.