Instant Coffee Drinks - Instant coffee is a beverage derived from coffee. Through various manufacturing processes the coffee is dehydrated into the form of either powder or granules. These can be rehydrated using hot or boiling water to provide a drink that most people are happy to accept as 'coffee'. However, more discerning palates might describe it as 'motor oil', 'bleeaaach!', or 'don't you have any REAL coffee?'.