Collecting bottle caps for charity

The students Frieda, Clara and Milla (L-R), as well as their teacher Rainer Claus (R) stand next to a vat filled with plastic bottle caps at the elementary school of the Elisabethenheim in Wuerzburg, Germany, 8 December 2017. Children, parents and family members have been collecing plastic caps for charity for the last two years - 100,000 caps have been collected since. Photo: Karl-Josef Hildenbrand/dpa (Photo by Karl-Josef Hildenbrand/picture alliance via Getty Images)