Minecraft wiki entry for Honey_farming, associated text: Honey bottles can be crafted into honey blocks in your inventory's crafting grid; you do get the empty bottles back. Honey blocks have a variety of useful features: As a floor, they reduce fall damage by 80%, but also slow movement and jumping. As a wall, they let players slow their fall and avoid fall damage. When moved by pistons, they can drag along adjacent blocks (like slime blocks) and even (unlike slime blocks) carry along creatures walking atop them. You can also craft them back into honey bottles, by putting them into a crafting table with four empty bottles (four separate slots/stacks).