This is the perfect collaboration between to useful products. If Shell had used a stress ball for example as a promotional products this would not work as well. However they used a travel adapter – a necessity good – exactly the same as the oil they are buying.
This is methodical marketing. You cannot choose just anything for a promotional product, you need to make sure that you choose something that will fit your target audience. For example using pen as a promotional tool for a target audience of 16-21 years olds would not be as effective as using a branded iphone cover.
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