hmmmmm , I recall once [1976?] my Dad looking pale and saying he needed to talk to me as I returned home one day
... I had just got back from a sailboat delivery and Mom had done my laundry
... she found the small relish jar with baking soda & sea salt that I used to brush my teeth
I had a similar incident in high school. I had these rolled wasp paper sticks that were used for 3-D rendering in a drafting/mechanical drawing/technical illustration class (1972, before there were common computer graphics. Drafting and design was done on a drafting board, with T-square, triangle, and HB leads, not AutoCAD.). My mother thought they were funny cigarettes.