Clear as a diamond!
The item id for Bottle in unturned is 6647. 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.
Size_X: 2
Size_Y: 4
Size_Z: 0.55
Blueprints: 1
Blueprint_0_Type: Supply
Blueprint_0_Supplies: 1
Blueprint_0_Supply_0_ID: 6647
Blueprint_0_Supply_0_Amount: 1
Blueprint_0_Outputs: 2
Blueprint_0_Output_0_ID: 6695
Blueprint_0_Output_0_Amount: 1
Blueprint_0_Output_1_ID: 6696
Blueprint_0_Output_1_Amount: 1
Blueprint_0_Build: 27
Blueprint_0_Map: Easter