Calcium chloride serves as a firming agent in prepared foods, including canned fruits and vegetables and tofu. These firming properties also help in the production of cheese, according to calcium chloride manufacturer Muby Chemicals. It makes the curds larger and firmer in store-bought milk, and a single teaspoon of calcium chloride solution can treat 2 gallons of milk. Other uses include as an additive to pickle brine, which gives it the salty taste without loading it with sodium, and as an ingredient in sports drinks.