|Man vs Wild Survival Pack|
The reason the water bottle and cover make a perfect promotional gift for this marketing campaign is because it relates to the theme of the show; survival. As well as having the potential that the bottle may be used in a public place, such as in agym, leading to higher visibility for the show.
The water bottle does more than spread the brand though, it also increases sales and profit for the box set, as most consumers would likely just purchase the DVD by itself, but the water bottle adds extra incentive to spend more and purchase the box set.
It also increases the perceived value of the box set, so they are able to charge more for the box set, meaning a higher margin for each box set sold.