Buy RS3 Beer barrel (flatpack)
The Beer barrel flatpack is a ready-to-assemble beer barrel in RuneScape 3. It is a tradeable item that weighs 1 kg, and it can be turned into a note for easy storage.
You can use this flatpack on the barrel space hotspot in the Kitchen of your player-owned house while in building mode. Placing it this way needs no Construction level and gives no experience. This makes it a simple way to add a beer barrel to your house.
Players who make their own flatpacks need level 7 Construction and 1 Cooking. Building one at a workbench uses 3 planks and 3 nails and gives 87 Construction experience. Buying the flatpack skips that step.
The flatpack has another use too. After you finish the hard Fremennik achievements, you can trade beer barrel flatpacks to Advisor Ghrim. Each one adds 59 coins to the kingdom's coffers in Miscellania.
You can also disassemble the flatpack for Invention. It gives 0.2 Disassembly XP and produces 2 materials, with a 92.3% base junk chance. Possible materials are Simple parts at 75% and Crafted parts at 25%.