PEHD. Tough, rigid, translucent. Space-saving rectangular shape. With PP stopcock and screw cap. Excellent chemical resistance, a good choice for storing and dispensing stock solutions. All sizes feature molded-in l and gal graduations. Built-in shoulder loops have sturdy handle attached. Leakproof. PEHD. Tough, rigid, translucent. Space-saving rectangular shape. With PP stopcock and screw cap. Excellent chemical resistance, a good choice for storing and dispensing stock solutions. All sizes feature molded-in l and gal graduations. Built-in shoulder loops have sturdy handle attached. Leakproof.