A lot of people make the mistake of thinking that only a few select items can be promotional products, but this is not the case. As long as it is branded, almost any kind of product can help in promoting a company. Anything and everything from a shoe logo to a laptop sticker.
A clever placement of a logo on a product is the first sign that will make people aware of the service selling a particular product. Once this attracts more people to look for such products, further word-of-mouth recommendations will further their cause in more ways than one.
Source: https://www.entrepreneurshipsecret.com/promotional-products/