Pre-filled wine glasses

I was in a Sainsbury’s in London not long ago and completely amazed by this:

A glass of wine for around £2.49. Chilled.

In a way, it’s ingenious because it’s for those who want a glass of wine instead of opening a whole bottle. On the other hand, for £2.49 you might already be able to buy a whole bottle. I wonder if you can keep the plastic glasses afterwards. Or is that tacky?

At any rate, this is apparently a “packaging revolution” and will finally put an end to wine being consumed out of a tumbler. Amazing, right?