This 1000 mL media bottle is manufactured from clear Type I borosilicate glass which provides the best chemical resistance. It comes with a black phenolic 38 – 430 rubber lined screw cap. Both the bottle and cap are autoclavable. This bottle is sturdier than an Erlenmeyer flask, with heavy walls that prevent breakage. The smaller diameter at the base conserves space in sterilizers and freezers. It features a large opening with a special pour lip that facilitates pouring and sloping shoulders. Graduations and a marking patch assist in measuring volume and identifying content. A tamper evident seal keeps the bottle sealed and protects the contents from accidental misuse. Hazardous communication labels are included to allow for content ID and safety notification.