Wide mouth bottles are transparent, with excellent mechanical strength. All caps are polypropylene except the cap for bottle 89050-118, which is modified polyphenylene-ether. Sealing caps feature a retained silicone gasket. All bottles and caps are autoclavable.
Screw cap for bottle 21020-108 can be replaced with sealing cap assembly 21009-901 for leakproof performance at high speeds or when hazardous materials must be contained.