50 Water
The item id for Frost Bottle Milk 00 in unturned is 36423. 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_Y: 2
Water: 50
Blueprints: 1
Blueprint_0_Type: Repair
Blueprint_0_Supply_0_ID: 36360
Blueprint_0_Supply_0_Amount: 1
Blueprint_0_Build: 27
ConsumeAudioClip: core.masterbundle:Sounds/DrinkSwallow.mp3