I have access to small vials made of various plastics that are used to store biological samples, in bulk purchases they are not expensive. Most have a gasket to prevent leakage. I can obtain a variety of samples from the sales person next week at a research festival. Barry of Blueline, if you are in the position to meet (I know you are dealing with a new house, so it may not be realistic), I live in Frederick, I could pass these samples along to you for evaluation. Pete