^Indeed, any rose could actually be used (as long as they haven't been chemically treated against pests - which most cut flowers, bought as such, have been).
A long-drink (soda, crushed ice and a shot of the infusion) is
a fantastic thing on a hot summers day!
And, as you say, jellies and marmalades from those hips are also very
nice. Plus: if you pick the hips before they're fully ripe they also contain large amounts of -whatsitcalled?- the stuff that stiffens the jelly/marmalade and thus only needs a bit of sugar. -but you'll need to remove the seeds for all that!
And wine made from those is also something that's good
'll need to rest for a few years before consuming)