Cork screws, umbrellas and other accessories

I saw a news story about something called a wine balloon. You put it a partially opened bottle to create an air tight seal to keep it fresh. I've been thinking of buying one for best beloved for father's day. Anyone tried it? Does it work or is it a waste of money?

I saw that too. I think the inventor was on the show Shark Tank. I didn't realize it was on the market now.

They have a website they are selling from. http://aircork.com/