Favored for their impact and chemical resistance, square plastic narrow-mouth bottles provide for compact storage. Square plastic bottles provide a tight screw-closure seal, protecting their contents from outside contamination during storage or transport. Available in numerous sizes, square plastic narrow-mouth bottles are temperature resistant, making them useful for refrigerated storage or autoclaving, while their translucent sides allow for identification of their contents during storage. Square plastic narrow-mouth bottles are typically graduated for ease of dispensing.