Separación por filtración – El que no pertenece

The video discusses a set of items: a coffee filter, a surgical mask, an umbrella, and a tea bag. It explains that the umbrella is the odd one out because coffee filters, surgical masks, and tea bags all function as filters, whereas an umbrella does not.

What is the main function of an umbrella compared to the other items?

In what context are coffee filters, surgical masks, and tea bags considered filters?