Quinine waters, also known as tonic waters, have a distinct bitter taste and are often used as mixers in cocktails. However, if you are looking for a milder alternative to quinine waters, there are several other options available to choose from. One option is soda water, which is made by carbonating plain water. Another is club soda, which is similar to soda water but contains added minerals. Ginger ale, another popular mixer, is sweet and spicy with a hint of bitterness. Finally, bitter lemon soda is a citrus-flavored drink with a slightly tart taste reminiscent of quinine waters. Each of these options provides a unique flavor profile and can be used as a substitute for quinine waters in your favorite cocktails.