Sparked by a Shark Tank episode and the latest variation on a packaging concept for single-serve wine, Couple interlocks two wine glasses using an integrated stem for efficient stacking and shrink wrapping. While building a better mousetrap is a clichéd goal for inventors in general, for those in packaging that goal may be a prepackaged, single-serve wine glass. We’ve seen a number of inventive plays off the concept over the years (you can see several of those here), and this latest one fits the…