The first thing that comes to mind with these teardrop cookie cutters is paisley.  I would love to decorate these with a paisley pattern all over.

Or even some fake pearl-like decorations with a glamours white and pink color scheme sound great.

Although teardrop is a common shape, I can't think of anything specific you would use these for besides to just create a pretty design on top.

I would be interested to know if you are looking for something like this, what are your plans for it?