This is a tough one.....even just trying to think of a logo or design trademark that doesn't appeal towards kids. Then you need to figure out which ones would be a good match for the product itself, and yet would appeal to a large audience. Then you have to consider whether the company would even be interested in the tie-in. Like someone else posted, with the image of
vaping that is promoted by non-vapers, this would be tough mountain to climb. The obvious choice would be the motorsports industry. Someone mentioned Ford and Chevy, but I think that would really only appeal to Americans and wouldn't exactly draw as many looks outside of the US and you obviously want to find something that would be marketed worldwide. I would think you would also want to include Ferrari red or Ducati yellow, or a classic Jaguar in British racing green. Black and silver can be represented with BMW or Mercedes. With the sleek look of tanks in stainless steel and glass, they just fit. Heck, they even already have mods with racing stripes (Evic-VT). Something like NASCAR would have a huge following in the US as they have a gigantic fan base, however on the other side of the pond Formula One is much more prevalent. Besides, NASCAR is already heavily marketed towards kids with lots of toys with NASCAR branding.