stopples

Stopples, also known as stopples or stopple plugs, are a type of stopper or plug used to seal openings. They are typically made from a flexible material such as rubber or silicone, and are designed to be inserted into a hole or aperture to prevent the passage of fluids, gases, or other substances. Stopples can be found in a wide variety of shapes and sizes, tailored to fit specific applications.

The primary function of a stopple is to create a seal. This seal can be temporary or permanent, depending on the design and intended use. In laboratory settings, stopples are commonly used to seal flasks, test tubes, and other glassware. They are often chosen for their chemical resistance and ability to withstand varying temperatures. In industrial applications, stopples might be used to seal pipes, containers, or machinery components to prevent leaks or contamination.

The design of a stopple can vary significantly. Some stopples are solid and are pushed or hammered into place. Others may feature internal mechanisms for tightening or expanding to ensure a secure fit. Some stopples are reusable, while others are designed for single use. The selection of a stopple depends on factors such as the size and shape of the opening, the pressure or vacuum involved, the chemical environment, and the required sealing performance. The term "stopple" is a general descriptor, and specific types may have more technical names depending on their precise form and function within a particular field.