Laboratory bottles with graduation, without cap, ISO 4796-1, with Retrace Code (Batch Certificate of Performance via Internet). Clear glass 1 according to USP/EP/JP.
Light shield up to a light wave length of up to 500 nm. External application of the paint ensures unchanged DURAN® characteristics in the interior of the bottle.

1) A bead is molded in glass on the shoulder of the 100 to 2000 ml size to indicate the nominal capacity level.
2) With a specially formed glass rim for better pouring (hence no need for an additional pouring ring made of plastic).
3) Complete
Important: Autoclave these flasks only with a loosely screwed cap (do not close tightly).
Membrane cap for all autoclavable processes see here. The bottle can be tightly closed with the membrane cap. The membrane provides for essential pressure compensation.

Silicone Bottle Holder
The new silicone bottle holder helps to stabilize bottles during such laboratory activities such as dispensing liquids with bottle mounted dispensers or connection caps, pipetting or filtration. The centre of mass of the laboratory glass bottle is set centrally in the bottle holder, so you can work comfortably and safely. The bottle is held securely in the holder by eight flexible ribs, making it suitable for use with all round and square bottles that have a diameter/edge length of approx. 75 – 120 mm. In addition, the holder can be used for holding other laboratory glassware, such as tall and low beakers or filtration flasks.