Michigan Wolverines 21oz double wall vacuum stainless steel water bottle. It's the perfect accessory to keep you hydrated during your workout or while cheering on your favorite team. With a capacity of 21 oz, this water bottle is perfect for taking on the go. The double wall vacuum insulation ensures that your drink stays cold for hours, while the stainless steel construction makes it durable enough to withstand daily use. Thank you for looking. I'm not sure if this was used. Very good condition.