4 oz dark amber cosmo round bottle with 20-410 neck finish. Cosmo round bottles are recognized by their slender, tall shape and steep rounded shoulders. PET or polyethylene terephthalate has high clarity, high impact resistance, above average chemical resistance and a good rigidity. Great for packaging lotions, creams, hair products, glues, paints and much more. See matching items below for the types of closures for this bottle.