Kieth, et al, and list, All plastics are not created equal, in porosity, thickness, durability, density, color or type. Plastic is not glass or metal. Glass and metal are non pourus whereas plastic IS pourus. Consider the plastic soda bottle. Soda bottlers know that CO2 travels THROUGH the plastic and thereby reducing the carobonation of the drink. Therefore, they increase the CO2 to compensate for the loss. CO2 molecules are very much larger than silicone molecules. The next time you are in the grocery store use you thunb and middle finger to finger flick bottle of the same size but from different companies. Lower pitched bottles have less CO2 pressure than higher pitched bottles. If you want CO@ to last a long time get soda in cans. Silicone, despite being a solid, have very little attraction for each other, and so migrates EVERYWHERE. If you are using car wax with silicone in it and the windows are open you will have detectable silicone in the room furtherist from the car in no time flat. I have not had silicone for twenty years and will not allow it in the house or shop. Newton nhunt@jagat.com
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