This method of constructing containers from transparent plastic is designed to produce inexpensive display units from readily available materials and to make sizes that are not commercially available. If ultra-violet filtering acrylic is used, it can protect specimens from damaging UV rays. Removable glass or moulded acrylic tops provide tightly fitting removable lids, minimizing evaporation of fluids from the container. Permanent acrylic covers prevent evaporation of fluids from the container.