Cloud 9 Health and Wellness Premium Silicone Non-Backflow Enema Douche Cloud 9 Novelties Health & Wellness Deluxe Enema Douche With Non-Backflow One Way Valve offers users a contamination free cleaning solution. The nozzle is designed with a built in check valve so that liquid can only flow out, eliminating backflow to make the process more sanitary and make. clean up easy. A flexible soft bulb with a non-tip flat bottom Built in check valve for one direction fluid flow. Bulbs capacity 7.9 fluid ounces. Cloud 9 Novelties Health and Wellness Deluxe Enema Douche With Non-Backflow One-Way Valve. A flexible soft bulb with a non-tip flat bottom. Built in check valve for one direction fluid flow. Easy soft grip bulb 7.9 ounces fluid capacity.