Don't leave home without it
- Familiarity: I've put it through the wringer
These things are awesome. Each one exactly fits a standard 750mL bottle of wine, and are totally leakproof. I've found them to be surprisingly easy to fill and to pour from, and I haven't noticed any change to the wine's flavor from being in plastic. As long as you squeeze any excess air out of the bag before closing it, you'll be able to keep red wine fresh for at least a week. I even use these around the house to keep a half bottle fresh for a couple days in the rare case that we have wine leftover.
These also work great for your favorite whiskey if you're planning an outing in 'brown liquor weather'