They don’t unless you have a good contract with them and even then it’s dependent on zones and package size.
Fun fact: USPS acknowledges that our US territories are domestic while UPS and FedEx treat them as international. So its a little more of a chore and cost to ship to Puerto Rico and the like through anyone but USPS from the 50 states.
It won’t help beers but I wouldn’t mind the wide scale reintroduction of decanters to the modern age. I have accumulated a few since I’ve been of drinking age and they all feel fancier than pouring from the bottle.