This 500ml polycarbonate media bottle with a polypropylene closure is unequaled in design or performance. The octagonal square shape provides an easy grip for pouring. It is transparent and autoclavable. It is perhaps the best design of any plastic lab bottle. Use with aqueous solutions, short-term storage of media, or for space saving (square) storage. The cap is made with virgin, high-temperature polypropylene, is liner-free, and comes with a leak proof guaranty. The neck ring insures security of shrink-wrapped seals and has a smooth interior, so there is no fluid entrapment and no back-flow contamination. The seal ring is molded inside the cap and fits rightly against the bottle neck, providing a leak proof system. Threads on both bottle and cap are continuous and straight-shouldered, semi-buttress threads that, along with the seal ring, insure a leak proof system which protects the integrity of the contained liquids. Beveled edges along the bottle side insure an easy grip for pouring. They are also designed so the entire bottle fits into most shaking incubators for direct culture applications. Graduation markings are optically clear molded-in for end user convenience. Uniform thick walls with beveled edges are a uniquely designed construction offering durability, strength, clarity, and improved heat penetration characteristics. A stable base insures that the bottle will not tip over during fill. The base includes a molded-in resin code, a recycling code, and the fill capacity. Capacity: 500ml. 24/Case. Dynalon® #: 626284-0500.