Right now on Amazon you can get these Kitchen Craft Colourworks Silicone Cupcake Cases, Pack of 12 for only $3.79 shipped.
Flexible, hygienic, silicone cupcake cases
Re-usable and stain resistant
Heat resistant to 260°c (500°f)
Can be co-ordinated with other items in the colourworks range
Be sure to double check the price before you buy- Amazon prices can [...]