I read, read, and read more. Haven't seen this question yet. For the very thick creams, whipped body butter, scrubs, etc. that are packaged in jars, what kind of jars are best? When looking at the suppliers' websites, there are so many to choose. What I'm really confused about are the double-walled jars. Is this just an extra luxury, or are there some products that really NEED to be in double-walled jars? I get confused over whether some things are simply a personal preference for looks, or if there is a serious reason to use particular containers. I am amazed after pricing some of the containers and wonder how much of the cost of some of my more high-dollar cosmetic purchases are just for the container. The "anti-aging" products are much more elegantly packaged than anything else. I feel that this is because women in my age group (mid 50's) are more apt to spend more on the "fountain of youth." At any rate, could someone please tell me about the double-walled jars? Didn't mean to ramble so.