When I was a teenager I used to go to Denny's all the time with my friends and get a banana split. Without fail, if I turned my back for a second, my ice cream would be destroyed. Here's a solution. Take one. It's yours. Leave me be!
I tried to be haughty about desserts in jars and how it's such an obnoxious fad like taxidermy in bars and guys who ride bikes and grow beards. But then I had an amazing goat cheese and berry mousse in a jar and changed my mind. Put it all in a jar! All of it! I take it back! Jars are charming and it could probably be scientifically proven that they make food taste 25% better.
If fairies were real, I'm pretty sure these would be their magic wands. Flitting around and granting wishes and collecting teeth and doing whatever else it is fairies do, they must burn a lot of calories. A frozen banana with sprinkles would be the perfect snack for a busy sprite.