1oz Empty Ink Bottle with Twist TopYou will receive exactly what you see in the picture. One 1oz bottle with Twist Top. NOTE: The twist Tops might be Black. We are consistenly running out of stock, and have two vendors. 1 that is white and 1 that is black. So you will sometimes receive white or black. This is the Twist Top Only. The bottle is always Clear.Polyethylene terephthalate (sometimes written poly(ethylene terephthalate), commonly abbreviated PET, PETE, or the obsolete PETP or PET-P), is a thermoplastic polymer resin of the polyester family and is used in synthetic fibers; beverage, food and other liquid containers; thermoforming applications; and engineering resins often in combination with glass fiber. It is one of the most important raw materials used in man-made fibers.QUESTION: Are these PET bottle restistant to the temperature of 120C?We must sterilize our product at this temperature and we must be sufficiently sure that these bottles, do not release injurious product, at this temperature.ANSWER: Yes, the bottle will not release injurious product at this temperature...  PET material is usually to make the water bottle , other food package, medical package.....  So it is a non injurious product.NOTE: CASE QTY is 600. So please order if ordering cases keep this in mind.