Can you bring glass on a plane? Glass is allowed on planes in both carry-on and checked luggage. However, there are some restrictions on the size and type of glass that can be brought. In carry-on luggage, glass bottles must be 3.4 ounces (100 milliliters) or less in size. Glass bottles that are larger than this are not allowed, unless they are empty. Glass objects that are not bottles, such as picture frames and vases, are allowed in carry-on luggage.