Yes, you can use your sodastream to carbonate your kombucha.This fellowhas some tips for using a sodastream to make kombucha extra bubbly. You can also create more bubbles naturally by doing a second ferment on your kombucha - plus it’s a great time to add flavor! Read more about secondary fermentationhere. And remember - even if your kombucha isn’t super bubbly, it’s still packed with beneficial bacteria!