Glass bottles for laboratory use are made of chemical- and scratch-resistant materials that don't absorb chemicals or smells. Glass withstands higher temperatures than plastic, making it a good choice for applications where substances will be heated. It can be sterilized between uses. Wide-mouth bottles allow easier access to liquids, powders, and solids than narrow-mouth bottles. Narrow-mouth bottles provide accurate pouring of liquids and granules. Rectangular and oblong bottles store more efficiently than round bottles and won't roll when on their side. Media, cell culture, and specialty bottles store samples, cell cultures, and buffers. Dispenser and dropper bottles dispense a small quantity of liquid.