I love Walmart! I was in an Eckerd drug store today and they had a good quality Faultless combination syringe for $15.95. It had attachments to use as a hot water bottle, douche, and enemas.
If you purchase a combination kit, make it for single use only, in other words if you use it for an enema, don't even think of using it for douching, and vice versa. Of course you can always also use it as a hot water bottle whatever else you use it for.