Let me begin with my crisis which lead to the discovery. A few weeks ago, to my horror, I ran out of my beloved UDPP and with no stores in my area stocking it, my only option was to order. Now I'm sure some of you savvy makeup junkies have already figured this out, but in my desperation I grabbed a pair of pliers to try and crack open the bottle to fish out any remaining dabs. Instead, I noticed the small clear plastic ring on the inside of the bottle which functions to keep the applicator clean and proceeded to rip that out. It must keep the applicator from reaching a great deal of the primer, because I've had plenty of primer for a few weeks now and haven't had to open my new bottle yet! I know this may seem like a really silly post to some, but I've heard several people complain that their UDPP ran out too quickly and I hope this tip may help someone.