This autoclavable cylinder is made of transparent polymethylpentene with a blue polypropylene base.  It has molded-in graduations that are large and easy to read. Shatterproof, so they are safer than glass and save you money in replacements.  There is no meniscus, so reading is easier.  Non-wetting, they deliver all they contain (calibrated To Contain/To Deliver at 20° C).  All sizes have generous spout.