That looks great for a winter treat! I preserve a lot of my domestic pears, too, mostly by canning, drying, or freezing. I haven't preserved juice from them.

From some research, it looks like your wild pear is the origin of the domestic Asian pears. I grow 4 different kinds of domestic Asian pears. Shenseiki, Large Korean Pear, Yakumo, and Yoinashi - they are all really sweet. But I could plant some of their seeds and get a more wild version, like yours! : )