Unlike oil of peppermint, oil of spearmint contains minimal amounts of menthol and menthone. The three most common flavorants are peppermint, spearmint, and wintergreen. Essential oils that have been investigated include rose, lemon grass, lavender, thyme, peppermint, and eucalyptus. Many lavender fields were in Mitcham, and peppermint and lavender oils were also distilled. It is made with a 3-to-1-to-1 ratio of bourbon, peppermint schnapps, and lemon juice. In 2003, breath strips in peppermint and cinnamon flavours were introduced. Kendal Mint Cake is made from sugar, glucose, water and peppermint oil. Natural menthol is obtained by freezing peppermint oil. Also included are minor cannabinoids and terpenoids, ethanol and propylene glycol excipients, and peppermint flavoring. Other flavors include peppermint and coffee. These flavors are provided by the respective oils, e.g. peppermint oil. A common side effect from oral intake of peppermint oil or capsules is heartburn. Snoopy acts as Peppermint Patty's ice skating coach. However, a conflict caused by Peppermint Fizz very nearly caused her to leave Strawberryland. Snoopy serves as Peppermint Patty's watchdog several times.