Fellow players and I were lamenting the lack of food preservation on trade o mats, when it came to our attention that you can place a trade o mat in a room that counts as a cellar, and it will have regular cellar preservation bonuses. It would be even better, however, if there was a trade o mat that had vessel bonuses.
Enter the Vend o Vessel. Made using a vessel and glass pane, this trade o mat variant has the vessel's food preservation bonuses for grain and vegetables, while allowing players to buy its products safely.
Vend o vessels, the future of pie trading!