A crucible with a lid is a container used in laboratories for holding and heating small amounts of substances at high temperatures. It is typically made of ceramic or metal materials, such as porcelain or steel, and is designed to withstand high temperatures and thermal shock.

Crucibles with lids are commonly used in various laboratory applications, including chemical analysis, melting and casting metals, and burning off organic materials. They are also used in the production of ceramics, glass, and other materials that require high-temperature processing.

The lid on a crucible serves several purposes, including protecting the contents from contamination and preventing the loss of material due to evaporation. It also helps to control the atmosphere inside the crucible, which can be important in certain chemical reactions.

Crucibles with lids should be handled with care, as they can become very hot and can shatter if exposed to sudden temperature changes. It is important to follow proper safety procedures when handling and using them, including the use of heat-resistant gloves and eye protection.

Overall, crucibles with lids are an important tool in laboratory settings, providing a safe and controlled environment for heating and processing small amounts of materials at high temperatures.