GSI OUTDOORS Nesting Wine Glass Set GSI Nesting Wine Glass Set of 2 The item has been opened, but no liquids have been poured into it. The material is BPA-free polyester, which is a plus. It's durable and won't break or dent. It can withstand temperatures up to 90°C, so you can enjoy hot wine, etc. Although unused, this is a used item. No claims and no returns accepted. Thank you.