Lucky Luke. 
haven't heard that name for decades... Sure brings back some memories... How about Sport Billy? Remember him? 
Doesn't ring any bells - we probably didn't get it here.
Or it was buried in the early afternoon, before we got home from school.
Ok, imagine a guy with a magic bag in which he has almost anything you can imagine from a football to spaceships, all in miniature size, and when he pulls something out of the bag, that item will grow to its normal size so the guy can use it... 
Sounds like something I could use in the real world...
IIRC there was a device like that in one of the Stainless Steel Rat books - "... for President", I think.
Removed 75% of the molecules and you carried the stuff around in miniature.
You also needed to carry around the machine to turn them back full size, of course.
