• The russian kvass
• Kvass from malt and concentrate
• Kvass from bread and dried crust
• Kvass from oat and wheat bran
• Kvass from vegetables, fruits and berries
• Kvass from birch sap, dairy and other products

In the old days they made kvass from birch and maple sap. They added dry apples and pears, honey and put into large earthenware pot or into a tub overroasted and pounded barleycorn.

Kvass from whey and honey is of certain interest.