Carefully sealed tomato paste.
The item id for Canned Soup Tomato in unturned is 77. You can use this ID with the commands below to spawn the item, give it to a player or buy it on a modded economy server.
Useable: Consumeable
Size_X: 1
Size_Y: 1
Size_Z: 0.3
Food: 40
Water: 15
ConsumeAudioClip: Sounds/DrinkSwallow.mp3