Wheaton glass french square bottles, 125ml (4oz) , clear, ptfe liner. Clear for sample observation ideal for solvent, chemical or sample storage square shape maximizes storage space white polypropylene ptfe lined screw cap packaged in convenience packs with caps attached to maintain cleanliness caps may also be purchased separately 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