Kombucha can be fermented with anything that you have in your kitchen. It really does not matter to the Kombucha SCOBY. It is, a matter of preference, for the connoisseur of kombucha. What matters most to the kombucha is the shape of the container. The larger the surface area the better. The depth does not matter. The ratio of surface to depth does not matter. What is important is that the kombucha bacteria have as much surface oxygen as possible.