Tinksky 30ML Empty Bottles for Tattoo Ink Pigment Green Soap - 10pcs (Random Cap Color) Color: the cap color will be sent at random. Material: Plastic. Shape: Round. Volume: 30ml(1oz). Bottle Height: approx.105mm. 10pcs in pack to meet different requirements. Great for used to hold store tattoo ink , pigment ,green soap or liquid. Durable twist cap makes it perfect for pouring.