I have been looking at ideas like an item that makes hallowed eggs, that you can throw twice a day and make glitter dust bombs, much like confetti eggs, and other tools such as low level detect shapechangers like compass.
Eggshell grenades from oriental adventures. They already come in the following varieties:
- dust (blinds)
- flashpowder (blinds)
- pepper (stunned)
- poison smoke (stinking cloud)
They don't quite fit what you're looking for, but the idea for the tool you want exists. Maybe mess with it a little. There is also the dust of appearance, if you want a wondrous item.
You could also just use bags of flower.