“I wonder if those filters in K-cups have those same microplastics?”
Or the K-cups themselves. They’re definitely plastic. How safe can they be?
The K-cups I did at Green Mountain Coffee Roasters had an inner filter made of a material used in regular(?) coffee filters. The plastic used is the type that would hold up to the hot water at the the optimal temperature for brewing coffee, tea, and hot cocoa: 192°F. I think those brewers could go even hotter.