Whether or not you can drink coffee in the refrigerator the next day depends on a variety of factors, including the type of coffee, its freshness, how it is stored, and the temperature of the refrigerator.
First of all, for fresh coffee beans or ground coffee, it is usually recommended to store them in the refrigerator for a few days after purchase. This is because the low temperature of the refrigerator can prolong the freshness of the coffee and reduce the likelihood of its oxidation. However, after taking the coffee out of the fridge, it is best to leave it at room temperature for a while to allow the coffee to return to room temperature if you want to enjoy it better.
Secondly, for ground coffee that has already been ground or coffee that has already been brewed, it is recommended to drink it within a few hours of brewing. This is because the compounds in coffee will gradually break down over time, resulting in a gradual deterioration of the taste and aroma of the coffee. If you keep the brewed coffee in the refrigerator, you can extend its shelf life, but it is important to note that the low temperature in the refrigerator may have an impact on the taste of the coffee.
In addition, it is also important to note that if the coffee is placed in an open container, or stored with off-flavored items, it may also cause the coffee to spoil or become contaminated. Therefore, when preserving coffee, it is best to store it in an airtight container and avoid storing it with off-flavored items.
To sum up, if you place the coffee in the refrigerator and enjoy it the next day, you need to judge whether you can drink it or not on a case-by-case basis. If the coffee is fresh, airtight, odorless, and placed in the right container, then it is ready to drink the next day. However, it is important to note that if the coffee has been left out for a long time or if there is an off-flavor, it is best to avoid drinking it.