I am new to inventing products, but I have an idea and I would like to know if it's marketable/patentable. This product idea would be an addition to an already existing product. I am not sure if it is possible to market/sell product that is associated with a specific brand/product. To give you a better picture about what I am trying to ask, I made up this example:
Let's say there is a company that makes plastic containers with unique sizes and shapes. The lid that they use for these products is different from any other brands. Let's say my idea is to make lids for containers with an opening in the middle and this lid fits all the brands out there except for the one with the unique shapes. Could I produce lids for this specific brand as well? Could it be advertised as an accessory to this unique container?
Thanks so much! :-)