Our 20 fl oz bottle is 4.8’’ x 2.8’’x 2.8’’ collapsed and 8.4’’x2.8’’x2.8’’ expanded, weighing about 6 oz.Our 12 fl oz bottle is: 4.0’’ x 2.6’’x 2.6’’ collapsed and 6.8’’x2.6’’x2.6’’ expanded, weighing about 5 oz.