Consecutively, sterilize the glass jars, or the yogurt maker containers and pour the milk in. Do not seal them too tightly! You can switch the yogurt maker according to its programming. If you do not have such appliance, wrap the jars with a blanket and leave them at room temperature for several hours to set. The time will depend on the temperature of the room. If it is nicely warm, the yogurt can be ready for as little as 5-6 hours. Otherwise, it may take more than 12 hours to set completely.