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These products already exist, so if you just have an idea, you would need to find someone to make that idea into a reality. This would mean that you would need an engineer or someone who has a science mind in order to make your product.
There are some companies out there who can help such as this one:
However, you should be careful as sometimes you will spend a lot of money to make a product a reality and not reap any of the rewards or you may have people who trick you into signing away your rights. Thus, make sure you talk to an attorney before you agree to have anyone make your product.
Once you have your product, you can market it to such companies as "seen on tv." http://www.telebrands.com/