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This product exists in the market already, there is little innovation.
Ceramic + Rubber will add weight and thus cause more stress though.
Does not really seems original, an example of the bottle is Gavin's one i think
Making a new material would be better. And look at this:http://en.wikipedia.org/wiki/Aerogel"Aerogel is a synthetic porous material derived from a gel, in which the liquid component of the gel has been replaced with a gas. The result is a solid with extremely low density and thermal conductivity."
The product is already out although I suspect you are trying to improve upon it,the final product is not as fleshed out as it could have been and should have had more distinguishing features than what is in the market