Wheaton glass boston round bottles, 125ml or 4oz amber, 22-400 finish. (4 oz bottle, boston round, red, type iii amber, ptfe liner) 4 oz bottles, boston round, type iii amber, ptfe liner. Amber type iii soda-lime glass ideal for solvent, chemical or sample storage packaged in convenience packs with caps attached to maintain cleanliness polypropylene caps with choice of liners hazardous communication label included with each case of bottles allows for content id and safety notification. Warning: this product can expose you to chemicals including tetrafluoroethylene, which are known to the state of california to cause cancer. Prop 65 warning