Design me a product

Hi, I have a product idea that I want to be developed into a marketable product design. It is in the field of kitchenware. As I have been through the design process with my previous invention, I know the nitty gritty of it and would only like serious and qualified freelancers to bid on my project. This will obviously be beneficial for my time and money but also for your profile. I have the preliminary sketches and some products that are designed on similar lines to my product. I would like you to design the product based on my idea and provide your insights to improve the design in any way possible without infringing on any existing designs. I will divulge the product idea once I find a freelancer I feel is fit for the job. You should have practical industrial design experience. I would like to see some work samples of your designed products that reached manufacturing stage. I will need final design in 3D CAD files in .stl file format. There is no time constraint but I would like to get it done in a reasonable amount of time. Remuneration will be justified. Although this is a fixed budget project, if there is more work required to improve the product further, a bonus amount will be provided for the additional work. I look forward to your proposals. Happy bidding.