I can not provide just one rule because of the weight and size of each item varies.
Art Deco Bohemian Amber Glass Collectible Perfume Bottle 1930' H.Hoffmann
Vintage Murano Style Art Glass Mini Perfume Bottle Fish Finial Brass 4" x 1.75"
Robert Burch 1979 Hand Blown Studio Art Glass Scent Perfume Bottle Glass Stopper
Roger Gandelman Style Hand Blown Art Glass Perfume Bottle With Dauber
Art Nouveau Yellow Glass Perfume Bottle With Dauber Lilly Of The Valley
Vintage Signed 5th St. Glass Studio Perfume Bottle 1999, 6 Inch Long Dauber
