Cake in a jar

Yesterday I made my muffins, but first I tried to layer all the ingredients in a glass jar, taking my inspiration from this lovely micro-company.

Slom jar, by Ikea

I've been thinking of making those into favours. I think it is always quite nice to take something away that people can reuse, as opposed to just eat within two minutes. There are so many ideas out there, it's hard to pick the right thing that will please everyone and still be original and reflect a bit of your personality. What do you think?