Australian Gold Hot Black by Australian Gold is a non-perishable item and does not contain an expiration. HOT! does not contain tingle. The period-after-opening (PAO) date is the length of time a cosmetic product is still suitable to use after being opened. The Australain Gold indoor tanning products use the Period After Opening date which is a symbol of an open cosmetics pot with a number of months or years inside. For example, a "12M" with an open jar symbol means you should throw the product out 12 months after you've opened it. The letter M stands for months and the number refers to how many months. Australian Gold Hot! Black Tanning Lotion is a tanning lotion that uses a combination of natural bronzers, DHA, and DermaDark to provide both immediate and delayed dark results.