Starbucks DoubleShot a Scarce Commodity

What market conditions would dictate that a person has to go to five (5) different retail outlets in order to find a Starbucks Doubleshot?  Are deliveries not being made on time?  Have a ton of people recently realized that crack in a can tastes pretty good? Perhaps ~$2.50 a can is a small price to pay to get high?

I had to drive to five locations to find a DoubleShot today.  First it was Walgreens.  Next it was the first of two Exxon stations.  Then it was an independently owned gas statiion.  Exxon again.  Finally, I was able to locate the prize at the second Walgreens.

Keep in mind that all the other Starbucks products and other energy drinks were WELL stocked in all locations.  So I can’t blame this on a delivery problem.