I'd like coffee please

My 2 older kids volunteered to go to the grocery store last night to get some coffee because we were out. Just to be sure that they knew the kind of coffee I wanted I showed them the empty jar.  Chloe insisted that she knew what it was and wouldn't forget what it looked like.  A 1/2 hour later they are back with a cake mix, yucky canned frosting, Swedish fish and some other candy.  They completely forgot the coffee and then they both blamed each other for forgetting it.  I admit, it was rather funny watching them argue over who was to blame.  Naturally, I had to go to the store and buy the coffee this morning. : )