Yes, you certainly can make as little as a half pot. As long as your unit is being used regularly (i.e., generally every day) then the always-ready hot water reservoir will be always be full. This means that whatever quantity of cold water is poured into the machine (up to a pot-ful) will be the amount of hot water that will then be dispensed. However, for the syphon action to work fully and properly, we do recommend that the minimum amount poured in to be a half-pot. Please let me know if I might be of further assistance. Thank you, and best regards, Neal.