The B850X is a 180 mL clear PET plastic foamer cylinder bottle with 43mm neck finish. Cylinder bottles have sharp square shoulders and a square base. Polyethylene terephthalate (PET) is marked with the resin identification code of 1. PET is of the polyester family and has high clarity, good chemical resistance, high impact resistance, and medium rigidity. PET is also light-weight and is used for products containing essential oils. Avoid using PET containers to store products that contain essential oils greater than 5% or fragrance oils greater than 15%. If your oil percentages exceed these respective levels, please consider using glass. This item has a 43mm neck finish. This container can be paired with a closure with a matching finish. This container is clear, making it an ideal display container for your product.