Borosil Brand Stoppers Bottles are available for every use. Since the Aspirator, Reagent and Solution bottles are not used for direct heating purposes they are made mechanically stronger with heavier wall thickness and these can withstand wet or dry sterilisation. Due to excellent chemical durability of the glass, most reagents can be stored in these bottles without much effect for long durations. Plain neck Solution Bottles and Centrifuge Bottles are tooled for uniform rubber stopper fit. Roux Bottles, Milk Dilution Bottles are widely used for culture growth, and they have flat surfaces.