Thistle Funnel

The Thistle Funnel is a piece of laboratory glassware designed primarily for adding small volumes of liquids to a specific position with precision. It typically consists of a long, narrow tubular shaft topped with a bulbous reservoir and a funnel-like section at the top, resembling a thistle plant.

Thistle funnels are made from high-quality borosilicate glass, which offers excellent chemical resistance, thermal stability, and optical clarity. They are commonly used in chemical laboratories to carefully add reagents to an existing system or apparatus, such as during solid-liquid reactions in conical flasks. The long stem facilitates controlled and slow liquid flow, minimizing splashing or overflow when adding liquids to narrow-necked flasks or other containers.

Available stem lengths typically range from 200 mm to 300 mm, with funnel diameters around 38-40 mm, allowing users to select the appropriate size for their experimental setups. The thick-walled design provides durability and resistance to breakage, ensuring a safe and long-lasting laboratory tool.

It is essential to clean thoroughly after use to prevent residue buildup that might affect future experiments. This funnel variant can be found with or without integrated taps, depending on the laboratory requirements.