A teak kitchen table flatpack can be made at a workbench (Steel framed bench or better) in the workshop of a player-owned house. This requires 52 Construction, uses 3 teak planks, and gives 270 experience. The flatpack can then be used on the table hotspot in the Kitchen while in building mode. This requires no Construction level and gives no experience.
The cost of making and selling a teak kitchen table flatpack from scratch gives a profit of: -2,439
After completing the hard Fremennik achievements, they can also be traded to Advisor Ghrim in exchange for 169 coins being added to your kingdom's coffers in Miscellania. See Flatpack: Miscellania reselling for details.