Dental floss harps? What class of madness are these? - Irish Times

Irish Times
Dental floss harps? What class of madness are these?
Irish Times
Lidl Dentalux 89 cent for 80 metres. We figured we couldn't possibly go wrong with this cheap own-brand floss. “It is only a bit of thread” is what we told ourselves as we opened wide and prepared to make our teeth sparkle. Then the piece of thread ...