By varying the proportions of copper and zinc, the properties of the brass can be changed, allowing hard and soft brasses. The density of brass is approximately .303 lb/cubic inch, 8.4 to 8.73 grams per cubic centimetre.
Both caffeinated and decaffeinated coffee might cause heartburn by encouraging acid production. Other caffeinated drinks, citrus fruit juices, tomato juice and carbonated beverages might trigger your heartburn. Citrus fruit juices include orange, grapefruit, lemon and pineapple. In some cases, these drinks might not cause symptoms because triggers depend on each person.
1 When you are purchasing a tea for acid reflux relief, make sure to find an herbal blend or green tea that is caffeine-free. Some teas are chemically decaffeinated, but there are plenty of teas that are naturally caffeine free and are beneficial for heartburn relief.  Avoid mint infused teas.