1. liquid injection processing, all processin is zero pollution
2. Have great design and Perfect joint line
3. This travel bottle pack easily into toiletry kits, purses, bags, suitcases, etc.. approved for airplane carry-on and meets tsa standards
4. Special "no drip" valve to helps keeps your bag and cap clean
5. The lid with a Skin Membrance for leakage-proof
6. The design is very perfect, body is soft, can squeeized