Culture, separation and analysis supplies are instruments and equipment used at the stage of researches on biotechnology, food, etc. Those instruments include incubators designed for the safety of researchers with minimal influence to their bodies, trays and disposable petri dishes to accommodate individual specimen, etc. Cell culture supplies are designed in such a way that bacteria and other contaminants will not intrude, and therefore capable of providing the ideal environment to artificially culture biological tissues such as cells for successful culture operations. Separation supplies are instruments for filtration, etc., and used for separating mixtures. Analysis supplies are instruments used for analyzing and measuring the specimens that changed during the course of researches. In particular, disposable petri dishes and the like make direct contact with specimens, thus single-use types are convenient. There are also products that are made in consideration of environment, such as those do not generate gases, etc., when they are disposed of.