I tried balloons or socks, but I agree silicon is much better. These are just like mine -- only one size bigger if I recall correctly. And I think she had them cheaper too They're a bit stiff, so they don't jiggle as much, but they seem to be pretty rugged. I don't store them in the boxes and haven't had any problems with them .

http://cgi.ebay.ca/Silicone-Mastecto...QQcmdZViewItem

Kassandra