Low density polyethylene with a white polypropylene screw closure. Convenient wide-mouth opening for solids, powders, overhead mixers, the same material benefits as 2210 series carboys, 100mm closure. Low density polyethylene (LDPE) resin is made using less catalyst than HDPE and is a better choice for reagents sensitive to the polymerization catalyst. Graduated to contain in 1 gallon and 5 liter increments. LEAKPROOF.