Bottom with inclinations such that the liquid feed flows to the trough as much as possible. The "DUAL" feeder comes complete with volcanello Art. C107 and semi-transparent plastic cover bells Art.C97. For solid feed (candy paste), it is used without volcanello and bell. by directly laying the bag of candy paste (better to use candisacc Art . C108. The bees pass through the side slits feeding without finding any obstacles due to the lowering of the bag, or in case, you use loose candy, you place it inside the feeder even with the volcanel inserted and without bell.To close the feeder, you reuse the polystyrene lid of the Beehive.