i'm moving out of the country and face a month long car ride, i was hoping to overnight my cat to my relatives so he wouldn't have to be on the road for a month, i don't have a cat carrier and have to leave in two days..
Well, I doubt any transport company, such as UPS, DHL or whatever would allow you to ship animals in a box. They probably require a proper transport cage and might also require some type of special flights in aircargo storages that is pressurized.... I bet you don't want a dead cat to arrive to your parents.
(iv) UPS does not regularly provide service for packages containing live animals. UPS will only accept live animal shipments on an exception basis. Transportation for packages containing live animals is limited, must be prearranged, and as with all other packages, will be provided only according to the terms and conditions contained in the UPS Service and Rate Guide.
It's fairly common to ship fish UPS, but I'm not sure they'd take cats. Even if they did, there's a better way to ship your cat. I did a quick Google search using the keywords "shipping" and "animals" and it seems that mostly airlines ship animals and they all have their own guidelines to do so. I would recommend doing your own Google search and then personally contacting the airlines that offer this service for pricing and instructions.