In this way the beverage can maintain freshness for a long period of time without the addition of preservatives. The small brick-shaped containers are easy to stack and display, and keep for six months without refrigeration.
鐵罐有不易破損、攜帶方便、用後即丟等好處，但初期的鐵罐，得用開罐器開；直到「易開罐」出現，開罐時只需手指勾住一拉，非常方便，甚受消費者歡迎，於是易開罐飲料大為風行。