An Erlenmeyer flask with a socket is a laboratory glassware commonly used for mixing, heating, and boiling liquids. The flask has a conical shape that provides a large surface area for reactions and allows for easy swirling of the contents. The socket is a small opening at the top of the flask that allows for the insertion of a thermometer or other accessory.

The socket helps provide a secure and airtight connection, which helps prevent leaks and spills during experiments. Erlenmeyer flasks are commonly used in chemistry and biology and can be made of heat-resistant glass for heating and cooling applications. They come in various sizes and capacities and can be used for a wide range of chemical reactions, such as mixing, boiling, and heating liquids.