Soda lovers often notice the different between drinking soda out of a glass bottle, aluminum can, or plastic bottle. There is a scientific reason for this phenomenon. Manufacturers dissolve the same volume of carbon dioxide into their plastic- and aluminum-bound products, but polyethylene terephthalate plastic is somewhat more CO2-permeable than aluminum. In other words, soda will leak out of a plastic bottle at a higher rate then a can. Over 12 weeks of storage in poor conditions—a hot place with direct sunlight—soda in plastic bottles can lose up to 15 percent of its carbon dioxide. If the soda gets warm while still in the can or bottle, the gas will leave the soda and enter the head space (the areas between the drink and the cap that regulate pressure) release into the air the moment you open the container. Also, canned sodas dissolve some of the metal affecting the taste of the drink. Glass is said to be the best container to drink coke because it is impermeable and doesn’t have a flavor extract.