It's safe to say that we all find great containers without lids. I came across Oogoo some time ago, but at the time I didn't think of using it for this purpose. Although I didn't come up with the stuff, I still wanted to share this with you. IMO this is easier than tracking down the perfect lid. Plus it's fun to make!
I originally got this idea from Grant Thompson "The King of Random" as seen below:
• How To Make "ProtoPutty" (Modified O...