Place a chest, crouch, and while looking at one of the sides, place a hopper. By crouching, you will be able to connect the hopper to the chest. Above the hopper, place a block, a rail on top of that block, and lastly the chest minecart (made by combining a chest and minecart). Break the block and rail, and the minecart should fall on top of the hopper. Put any object into the chest minecart and it should transfer to the bottom chest.