Sizeable jerrycan of gasoline.
The item id for Jerrycan Maple in unturned is 1114. 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: Fuel
Size_X: 2
Size_Y: 2
Size_Z: 0.6
Fuel: 300
Blueprints: 1
Blueprint_0_Type: Tool
Blueprint_0_Supplies: 2
Blueprint_0_Supply_0_ID: 61
Blueprint_0_Supply_0_Amount: 7
Blueprint_0_Supply_1_ID: 69
Blueprint_0_Supply_1_Amount: 2
Blueprint_0_Level: 1
Blueprint_0_Skill: Craft
Blueprint_0_Build: 27