Graduated containers are especially useful when mixing products. Semitranslucent, natural polyethylene allows the liquid level to be seen from outside the tanks (the resin used for these tanks meets FDA standards). They handle temperatures up to 140°F. The 25-gallon and 45-gallon tanks are lightweight and nestable for tank storage and shipping. The 55-gallon tank comes with a 3/4" spigot valve already fitted and is not nestable. All tanks may be shipped Ground at dimensional rate. Covers are sold separately.