We Sell Cheap Plastic Bottles. The bottle is a place that is used as storage with a neck that is narrower than the body and mouth. Bottles are generally made of glass, plastic or aluminum, and are used to store liquids such as water, milk, oil, soy sauce etc. Plastic bottles are usually made by extrusion. And the tools used to cover the mouth of the bottle are called bottle caps (external) or plugs (internal). The bottle can also be closed by means of an induction seal. PT. Berkat Indoplast Bersama selling various types of plastic bottles at cheap prices and the best quality.