These are a great size for my daughter's beauty shop. A lot of time, her clients want to try a product she is using on them, but don't want to invest in a large professional size bottle of it. She can fill one of these for them and they have a big enough supply to use for about a month. The come with a chalkboard type label so with a chalk marker, you can really make a cute sample bottle out of them. They usually like them well enough, that they bring in their bottle to have it refilled because they don't want to throw them away.