Ideal for pharmaceutical or similar type packaging, these translucent bottles are Boston round in style and molded from FDA compliant material.Matched polypropylene caps have a ring-seal design for a perfect, leak-proof fit; ribbed for torque-closure and easy openingDeep square threads withstand vibration; help prevent closure back-off during shippingSmooth, rounded inner bottle surfaces for easy cleaning and thorough emptyingUnderside of bottle lists volume, material and includes an indexing notchRecycling codes listed on 500 and 1000 ml bottlesAutoclavable to 121 °C (250 °F); do not autoclave with caps in place