Why do I stab at plastic mouthwash bottles with my best and sharpest kitchen knife? Because of April Fool's Day.
Some years ago, my wife, as an April Fool's prank, replaced the mouthwash in my usual bottle with coloured tap water. I complained to her that the mouthwash wasn't working very well, and she told me straight-faced that it must have expired. Then she collapsed into a fit of self-congratulatory giggles.
Since then, I have been careful to stab drain holes into the mouthwash bottles after I am finished with them. Today, however, I was presented with this cornucopia of products that defy Oral-B orthodoxy.
Personally, I hate April Fool's Day.