Men's deodorant(maybe women's too?). I'd always pulled the tab with my teeth.

I came across a comment somewhere a few years back with someone complaining about those covers, and how they also use their teeth and hate how the taste gets in their mouth. I immediately felt vindicated in my complaints.

Someone replied something to the effect of "you know you're supposed to just spin the dial like normal, and it'll push the cover off by itself, right?"

I don't think I'd ever felt dumber in my life for not putting two and two together on a product I use daily...