Supermarkets and drugstores are notorious for this. Supermarkets will often see a product that is selling well and copy it as closely as they can without going

Supermarkets and drugstores are notorious for this. Supermarkets will often see a product that is selling well and copy it as closely as they can without going over the line -- similar colors, size, packaging -- then sell it under their own brand right next to the branded product at a more attractive price. It feels unfair if you're a producer, but it's often just one of the costs of having access to the distribution platform.