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Funnels holders are made of various materials such as wood, plastic or metal. Wooden funnel holders have multiple slots for holding funnels of different sizes. Bottles for different substances can be filled at the same time with the help of such a holder. Plastic Funnel Holders, made of polystyrene, are very durable and less expensive for use in laboratory. Plastic funnel holders come with single to multiple slots for holding funnels. These are great for filling multiple bottles of tinctures, reagents, microscopy stains, etc.