Pyrex 500ml media bottle with GL45 closure wholesales-Lab . cg-8092 - bottles, media, storage, square, graduated, gl bottles, media, storage, square, graduated, gl screw threads, pyrex® CG-8092 Square bottles are easier to handle, require less space (13-20%) on the shelf or in the autoclave and are ideal for mixing, sampling and storage. Professional 500ml GL45 square bottles price-HPLC Sample Vials