Gl45 Reagent Bottle With Closures. The borosilicate reagent bottle with PP screw cap is economical and practical, suitable for various laboratory applications. Round, with scale, DIN GL 45 thread, casting ring and blue PP nut. Amber Rated 5 /5 based on 466 customer reviews. Blue Cap Reagent Bottle gl45 reagent bottle Screw Top Reagent Bottle.