Store reagents, analytical standards and culture media in these glass reagent bottles. PyrexTM Borosilicate Glass Narrow Mouth Reagent Bottles with Glass Stopper features excellent chemical resistance and can withstand high temperatures.Manufactured from PyrexTM superior strength borosilicate glass. PyrexTM Borosilicate Glass Narrow Mouth Reagent Bottles are ideal for storing chemicals in the laboratory. Use rubber stoppers (not included) to secure. Available in 25ml,50ml,100ml,250ml,500ml,1000ml and 2000ml