Cap for BOD bottle, WHEATON®

This polyethylene cap, complete with a closed cell foam insert, snaps firmly over the flared mouth of Wheaton BOD bottles.

• Polyethylene cap prevents evaporation
• Includes foam insert

This closure prevents the evaporation of the water seal during the five-day BOD incubation period. The foam insert fits into the cap and exerts pressure on the bottle stopper to hold it securely in place.