Jayne <--- from your post above you sound like you might have been the "marshakenny" who started this topic??? Your post above might make more sense if we knew this.
Regardless of if you are or not, sometimes it only takes an email to the toothpaste marketing director of companies that manufacture toothpaste suggesting this "idea". In that email I would direct them to this topic so that they may read everyones input (and interest).
As you (Jayne) are a teenager, you may not know how to search out those contacts and suggest this to them. I think this is a really great idea and would be glad to do that for you if you wish. I know this can be done but, when I pass it to each company, I must give proper credit to who started the topic.
marchakenny <---- please update your profile so that I may give credit where due OR better yet, email/IM me with the identity you wish me to pass on in a disclosure of the idea to manufactures. Remember, some companies are VERY reputable and pass on monitary rewards for an "idea" (not patented) that they successfully market. Example: the phone cord untangler -- 3 MILLION DOLLARS US -- and it wasn't patented (only an idea sketched on paper by an attorney --> never invented anything before).
Before I wrote this, I talked with a PHD friend in chemical engineering and my daughter who is working on her masters in chemical engineering and this CAN BE DONE. As I said in my previous post, the engineering is NOT the problem -- execution is.
OK EVERYBODY -- NEED INPUT ON THIS!!!
Assuming the product is ready to market --> HOW can this be done without teenagers being able to find a work-a-round???
This problem must be resolved before submission to companies else they probably won't consider it.
MissPlayful <--- SHHHHHHHHHHH!!!!!!! PLEASE!!! ...from experience, I already know you'll nail this one --> just want to give brainstorming a chance here ok?