Which component is not typically found in improvised meth labs?

Fast food containers are generally not associated with the setup of improvised meth labs. While they may be found in a variety of settings as disposable items, they do not play a functional role in the meth production process. On the other hand, fire extinguishers are critical safety equipment that could potentially be present due to the high risk of fire associated with the chemicals involved in meth production, although their use in a meth lab is more about safety than actual production. Soda bottles often serve a practical purpose in the meth-making process, particularly in the synthesis stages, and pans and cookware may also be employed for various purposes, such as heating or mixing substances. Thus, fast food containers stand out as not typically being a necessary or relevant component in an improvised meth lab.