Figure 1. Snap top vials with micro-plastic samples for the model experiment of the sediment analysis. These were made as various everyday objects, which can still be assigned with the help of the colours even after the analysis

From

Student Experiments on the Topic of Micro-plastics in the Environment for Secondary Education Level II: The Coffee Pad Machine Experiment and Sediment Analysis

Sarah Vortmann, Dominique Remy, Jörg Klasmeier, Marco Beeken

World Journal of Chemical Education. 2019, 7(2), 96-101 doi:10.12691/wjce-7-2-9