If it is a gift pack for someone that isn't into this hobby to the extent that many of us are, PwC would be an excellent product to include.
SS&S wash, BnB tire dressing, NL vinyl treatment, LS leather conditioner and PwC polish/wax would all be user friendly products for a newbie and still be nice for an oldie.
Just my personal opinion, but Spray & Wipe should be in everyone's stocking.