2 oz natural-colored HDPE cylinder round bottle with 20-410 neck finish. Cylinder bottles have sharp square shoulders and a square base. High density polyethylene (HDPE) has a high tensile strength, good resistance to chemicals, good impact resistance, highly rigid, and highly scratch resistant. This item has a 20-410 neck finish. The first number refers to the diameter (in mm), and the second refers to the closure depth, style and thread. This container is paired with a flip top cap. Sold by the case, each case has 100 bottles and 100 caps in it.