Hi, I find the bulb syringe is best for my kids. I have given with a Cara 4 oz and a Cara 8 oz. Depends on what type of enema is to be given. For my self I use a 2 quart red rubber enema bag. Some prefer to use the bucket type for enemas. I cannot afford the bucket one. The two quart red rubber bag works fine. Will the enema be for yourself or your kids? Val has some great into posted. You can also find optimalhealthneteork dot com is helpful Heisting there is very good