Question: I am a retailer and have had customers ask whether the plastic bags in wine boxes are BPA-free or not. What can I tell them? Answer: The short answer is: "It depends." A fairly recent innovation in wine packaging, the so-called Bag-in-Box (BIB) dispenser makes use of a plastic bag with a nozzle surrounded by a corrugated cardboard box. The whole package sits easily on a shelf and usually features a built-in spout for easy pouring and resealing.