Which characteristic is true about rigid containers used in sterilization?

Rigid containers used in sterilization are designed to maintain the integrity of the sterilization process and the sterility of the instruments inside. One of the key characteristics of these containers is that they often feature tamper-evident locks. This safety feature ensures that once the container is sealed and sterilized, it provides a clear indication if someone has opened or tampered with it before it is used. This is crucial in maintaining infection control and patient safety, as it helps staff verify that the contents remain sterile.

The other options may not accurately represent the attributes of rigid containers. For example, while some rigid containers might be designed to be easy to stack, they are not flexible, nor are they typically disposable, as many are designed for multiple uses. Additionally, rigid containers are often reusable, so the statement that they cannot be reused is misleading. Overall, the presence of tamper-evident locks plays a vital role in ensuring the safety and efficacy of sterilized instruments.