The advantages of two-piece vacuum ink cans: 1. Smooth inside and outside surfaces 2. Light weight, high strength, using hard and durable material: Tin-free Steel. 3. Smooth inside bottom without welding lines by using deep draw technique. 4. Easy to pour completely. 5. By using two-piece vacuum cans sealing machine, the ink cans can be fully pressurized to insure the quality and safety of the inner goods. 6. It's easy to pile up and convey. Therefore it will save the transport cost and stock space a lot. It will save 80% of stock space. --one 20ft container can be filled in about 50, 000 sets (including ink can and cap) --one 40ft container can be filled in about 110, 000 sets (including ink can and cap) 7. It's recoverable.