FridgeLogic: Why don't the Apples limit one mug per pony, if they ALWAYS run out? It seems like the logical thing to do, and it would add a bit more drama in that they ''don't'' make enough for everypony. It could simply be that there are more ponies like Pinkie Pie, who buy multiple mugs that stop everypony in Ponyville from getting cider.
* Why didn't Rainbow Dash just visit Pinkie Pie and ask for some?