Filling containers involves placing a substance, such as liquid, solid, or gas, into a receptacle designed to hold it. Common containers include bottles, jars, boxes, and tanks. The process can vary depending on the material being filled and the type of container used. Different methods are employed for filling containers, such as pouring, scooping, or using machinery. For example, bottling plants use automated systems to fill thousands of bottles quickly and accurately. Proper filling techniques ensure that containers are filled to the desired level without spillage or waste, which is important for both efficiency and safety.