Clear Glass Boston Round Bottles offer maximum visibility and sample integrity. These general use bottles are perfect for liquids, product storage, and field or plant sampling projects. They feature a round body, rounded shoulders and narrow screw neck opening. These environmentally sensitive bottles help eliminate waste and help to insure product integrity for long term storage. Attached black phenolic (thermoset) caps with pulp/vinyl liners are perfect for general use. The liner is made of a vinyl coating applied to HDPE-coated (high density polyethylene) paper, which is laminated to pulpboard. This general purpose pulp/vinyl liner is commonly used for food, beverage, medical and chemical applications packed at less than 120? F., including mild acids, alkalis, solvents, alcohols, oils and aqueous products; not recommended for active hydrocarbons or bleaches.