Boxes of wine are said to be more sustainable because they take less carbon to produce and they are much lighter than wine bottles so they also use less carbon to ship. However, unlike glass bottles, the plastic bladder boxed wine is stored in is not recyclable.
Waste Status
Bag is not recyclable curbside.
Alternatives
EASY: Canned Wine
Canned wine is a great alternative to both boxed and glass bottled wine. Like boxes, cans have a smaller carbon footprint, plus aluminum can easily be recycled over and over again.
Medium: Creative Uses for Empty Wine Bags
Some people have gotten pretty creative with their empty wine bladders. After cleaning them folks have used them to make ice packs, camping pillows, and more.