A Dropper is a unique redstone device that is a near-combination of the Hopper and the Dispenser. Droppers can transfer items from it to a chest or another container when activated by a redstone signal.
Droppers are similar to the dispenser, with the key difference being that a dropper produces items from all objects when activated, instead of summoning projectiles from applicable objects. The dropper is fully functional when it comes to transporting items. They are very economic to make, being less costly than creating a hopper. The dropper also functions similar to the hopper, transferring items into containers with a redstone signal.