Drainage Products are avaliable here. Drainage products suction canister liner is one of the most economical and widely used fluid waste collection system in the healthcare industry.Urine drainage bags collect urine. Your drainage bag will attach to a catheter (tube) that is inside your bladder. You may have a catheter and urine drainage bag because you have urinary incontinence (leakage), urinary retention (not being able to urinate), surgery that made a catheter necessary, or another health problem.