What is one of the uses for coils of copper wire sold in Warsaw?

Coils of copper wire are used to rid food of poisons due to the properties of copper that can react with certain types of toxins. Historically, many cultures have recognized that copper can have antimicrobial effects and has the potential to neutralize some harmful substances. In culinary practices, particularly in certain regions like Warsaw, using copper in the cooking process has been a method to improve food safety by mitigating toxic elements that may be present.

The other options, while plausible in different contexts, do not align with the specific traditional use of copper wire as effectively. For example, cooking food typically involves pots or pans rather than wire, and while copper utensils can be cleaned, the primary function of the wire in this context is not cleaning but rather to enhance food safety. Similarly, while decoration is a common use for copper in general, it does not relate to the specific function of copper wire in this scenario. Thus, the focus on the wire's ability to address food safety highlights its unique and culturally significant application.