4 oz natural-colored HDPE plastic cosmo round bottle with 24-410 neck finish.
The cosmo round, also called bullet round and imperial round, is characterized by its tall and slender build with steeply rounded shoulders. High density polyethylene (HDPE) is marked with the resin identification code of 2. HDPE has a high tensile strength, good resistance to chemicals, good impact resistance, highly rigid, and highly scratch resistant.