In a laboratory, labware is used to transport and store materials safely. In a laboratory, beakers are used to stir, mix, or heat liquids. They usually have a pouring lip on them. Graduations are used to measure the volume of a liquid in graduated cylinders. For increased measuring accuracy, they are narrower and taller than beakers. Burets are used to precisely measure and dispense liquids, such as chemical solutions. For spectroscopic studies, cuvettes are small, clear tubes with specialized optical qualities. The bottoms of flasks are wider, while the necks and tops are narrower. Large amounts of liquids or solvents can be stored in carboys, jerricans, and jugs. Manually crushing and grinding substances into fine powders is done with mortar and pestle sets. Cone-shaped tubes that route liquids or powders into containers with tiny apertures are known as lab funnels. Materials are stored and tiny spills are contained in lab trays and pans. They are chemically robust and long-lasting.