Baileys Irish Cream is an alcoholic beverage and should be treated as such. It has a shelf life of two years, so it should not be kept longer than that. If the bottle is stored in a cool, dark place and the seal remains intact, then it can last up to two years. In addition, if the drink has been opened, it should be consumed within three months for optimal taste. It's important to pay attention to the smell and appearance of Baileys when deciding whether or not to keep it. If there is an off-smell or taste, then the drink should be discarded immediately. Similarly, if there is any discoloration in the liquid or sediment at the bottom of the bottle, then it's best to get rid of it as well.