Honeybees make water from nectar, which they get from flowers (e.g. clovers, dandelions, berry bushes, fruit trees). They suck up the nectar from the flowers with their tubelike tongues and store it in their honey stomachs (they have two stomachs, one is used for transporting honey, the other is just a regular stomach). The honey stomach hold around 70mg of nectar and weighs as much as the bee does when full. To fill the stomach, bees must visit btw. 100–1500 flowers.
After visiting the flowers, the bees return to the hive, and other bees suck the nectar from the honey stomach, after which they “chew” the nectar and break down sugars in the nectar into simple sugars, making it easier for bees to digest. That takes about half an hour. Then the honey is spread out through the honeycombs so water evaporates from it, and the process is sped up by the bees fanning their wings. When the honey is gooey enough, the cell is sealed off with a plug of wax. Then the honey is stored until it is eaten.