The bag keeps air out of the wine, so it’s a much better system than letting your undrunk wine just sit around getting touched by gross air.
Why Bag-in-Box Wine Is the Best
Audrey Ference
6216
This is exactly why I buy it — I live by myself so I’m responsible for drinking all the wine (the horror…) and sometimes I open a bottle one night but don’t feel like finishing it the next. Just leave a bag-in-box in the fridge and drink at my leisure.