I actually have a girlfriend who lives in another state who went and bought grapes just so her kids could enjoy them year round like we do, (they came for a visit and LOVED them) so if you don’t have access to a grape vine then you could just purchase them at the grocery store if you find them on sale. (If you don’t have access to grape vines, there have also been some GREAT sales on grapes lately…and/or check produce stands, farmers markets … I have even seen BAGS of them at a garage sales… so check around…if people have vines, then they might have more grapes then they know what to do with!)
I wash them really well and then strain them to dry. I purchased (on clearance last year!) those plastic freezer containers that are right next to the canning supplies in the grocery store.
They stayed great all year. We JUST finished our last container from last summer and it was as good as the first. Inexpensive, EASY and healthy…not to mention delicious…!! *very important note: we eat them frozen … before they thaw…they get gushy when thawed!!