"I have a little Americano left, can I leave it and have it tomorrow?"

It's best to finish coffee within 24 hours, and if you don't touch it, it's okay to leave it for five days.

If you drink coffee slowly, sometimes you can leave coffee left over even after a whole day, especially if you drink a large cup or get another cup, it can be a waste to throw it away. Even after time, it doesn't smell spoiled, and the color stays the same, so it's easy to think it's okay to drink it the next day. So, is it really okay to drink leftover coffee the next day ? It's said that drinking an Americano in the morning in the afternoon is okay,,,, Americano Only beans and water are added, so it spoils more slowly than other foods, and it has a sterilization process where you rinse with hot water once, so the initial contamination level is low. Food spoilage occurs due to nutrients, such as carbohydrates, proteins, and fats, which multiply and break down nutrients, resulting in unpleasant odors and the production of harmful substances. Depending on the nutrient, these changes are called differently: proteins are called spoilage, fat is called rancidity, and other components including carbohydrates are called spoilage, so in Americano, spoilage, rancidity, and spoilage are all unlikely. Fat or protein is either absent or contains very small amounts, and the amount of carbohydrates is very and Americano is usually in an acidic environment (pH between 4.8-6 ), which bacteria dislike. Still, mold can develop, so drinking a cup of coffee for too long is not good, and if left for 4~5 days , mold will develop,,,, and anything left untreated for such a long time should be discarded. The biggest factor for coffee spoilage is putting it in your mouth, because the moment you touch it, bacteria in your saliva Since it gets in, it's safer to drink coffee for 24 hours after it touches your mouth, and then discard it. If you don't put your mouth on it and leave the lid open, you can leave it at room temperature for about five days, and if refrigerated, it can stay fresh for at least a week, but after this period, bacteria start to multiply.