Our natural HDPE plastic narrow mouth bullet bottles, also known as Cosmo Round Bottles, have a tall and lean shape. Their flat base is stable for easy filling and the rounded shoulders allow every last drop to be easily dispensed. Bottles are flame treated, which makes label application easier. The included PP disc top caps make dispensing easy without ever having to remove the cap! Simply push the indent found on top of cap and the orifice is exposed. Once dispensing is complete simply push orifice down to protect contents and prevent spilling.