Clearwater Engineering, of Clearwater, Fla., has introduced a newly designed disposable groundwater sampling bailer called the TITAN II. It features a patented hemispheric check valve that provides a tight seal and is guaranteed not to leak. This significantly improves upon the old style check ball commonly found in most disposable bailers. Another new feature is counterbalanced weights on both the top and bottom of the bailer that are located outside of the bailer tube.