Creativity Pool Forums

I was wondering if there is a place to post ideas to better an already made product? If one had an idea for a specific company, then should one write it down on this forum or write the company? I have a lot of ideas. I am just unsure how to categorize them or filter them down to what a lot of websites ask for.
I often buy products and think if one thing was changed they would be stellar. If there is not a place to post this type of thing, can you make one?