If the theme or vibe of the reception made mason jars a fitting accompaniment, I would definitely drink from it, probably using a straw. I have plenty of mason jars from various projects and probably would not take it home. I'm probably more the age of your parents, though. I'm pretty certain my kids, who are in their late 20s/early 30s, do not already have mason jars and would be more likely to bring them home.