This bottle is made of environmentally friendly PP and AS material and silicone sealing ring, which is no water leakage when rotating and shaking. 12oz capacity is enough for daily life. Features unique slim shape is very portable, very convenient to put in the bag or in your hand, large enough to keep you hydrated, stylish and compact design to carry around. Quantity above 1000 will be shipped by sea. Custome the bottle color also supported when the quantity over 3000. Welcome to inquiry!