Ampuls, also known as ampoules, are small glass or plastic containers used in the pharmaceutical industry to store liquids for injection. Some synonyms for ampuls include vials, phials, and flacons. Vials are similar to ampuls in size and shape but are commonly used to store medications that are not intended for injection. Phials, on the other hand, are small, bottle-like containers typically used to hold perfumes or essential oils. Flacons are also a type of small glass bottle used to store liquids, but they are often associated with luxury perfumes or other high-end beauty products. Despite their slight variations in usage, these synonyms for ampuls essentially refer to small containers used to store liquids for various purposes.