Rollers are laboratory devices used for the gentle mixing and agitation of liquids in various types of containers. These instruments typically consist of a series of rotating rollers that turn horizontally, allowing containers such as tubes, flasks, or bottles to roll along their surfaces. This rolling motion facilitates thorough mixing of solutions, suspensions, or cell cultures while minimising turbulence, which is essential for preserving the integrity of sensitive samples. Rollers are commonly employed in microbiology, cell culture, and chemistry labs for applications such as sample preparation, cell growth, and biochemical reactions. Available in different configurations and sizes, they cater to a wide range of laboratory needs, making them a versatile tool for researchers requiring effective and gentle mixing solutions.