I feel hopelessly outclassed! The only thing I have from a commercial source is a silicone colon tube, Fr 42 from OHP. Even this has a home made modification (bulbous tip) suggested by NMArcher.
I own only one bag, and that is a recycled silvered plastic liner from an old 5 litre wine box. It's fitted with nylon monofilament loops to hang it by (Yeah, fishing line). I use this when travelling as it will fold up to almost nothing and is easy to pack.
The bucket I use at home for enema solution is a recycled 5 litre paint container (nice steel carrying handle also hangs it up). Delivery is by 3 metres of plastic tubing used as a siphon. The bit that goes into the liquid is stiffened by an internal narrow-bore copper tube, that might once have been part of a fridge thermostat. It is shaped to a gentle curve where it goes over the lip of the bucket and prevents the plastic from kinking. The suction end of the internal copper tube is crimped over the outer plastic to hold it in place permanently.
I have a home made inflatable nozzle of vast dimensions. It is made from a large bore plastic tube about 25 mm OD and 180 mm long (1" OD and 7" long), stiffened inside with short lengths of rigid plastic electrical conduit tubing. This arrangement allows the large bore tube to bend without collapsing under pressure. The business end of the large bore tube is faired over to a blunt, smooth tip by careful heating and shaping using a funnel, the opening left being about 10 mm (3/8") diameter. Over the outer tube is lashed a section of mountain bike inner tube, the lashings being concealed under overlapped ares of inner tube. The valve to inflate is positioned about 40 mm from one end. A doubled-over sleeve cut from the same bike inner tube is pushed up to the valve stem from the delivery end of the nozzle. This is about 50 mm (2") long and when the nozzle is fully inserted in my rectum, it sits inside the anal sphincters (outer and inner) and prevents the nozzle from expanding under it.
This nozzle inflates to about 900 ml (about a quart) inside me, completely filling the rectum right up to the flap or kink that connects colon and rectum. It doesn't leak a drop, even under severe provocation!
The nozzle assembly is completed with a short length of garden hose (a convenient interference fit inside the inner rigidifying conduit) to which is fitted a standard non-return garden hose quick connector. So when I'm full, I can and do just disconnect from the enema tube, and walk free with the nozzle still firmly in place.
I have made a similar inflatable sleeve for the colon tube, described elsewhere in another post. This is a sliding fit over the colon tube when deflated, and allows me to work into myself as much of the colon tube as will go before sliding the sleeve along the colon tube and into m anus. When it is seated nicely, I can pump it up so that it simultaneously grips the colon tube inside it, and inflates to fill the rectum around it. Once again, when I'm full, I can disconnect the colon tube (fitted with a similar garden hose connector) and wander off to lie down, dance the 'cramps jig' or whatever until it's time to expel!
For use with psyllium husk gel, which I also like to pack my colon with (it is a sort of solid enema), I use an industrial strength version of my inflatable nozzle, made from a length of 50 mm (2") plastic waste pipe about 250 mm (10") long. This is a simple pump, fitted with wooden piston and clad with a piece cut from a 70 mm motorbike inner tube (yes, it is also inflatable!).
I have a well-stretched anus, and can work the pump barrel about 180 mm into me (7") until its delivery end is against my internal colon flap. This will push psyllium husk 'turds' into my colon directly. I can comfortably hold a litre of this stuff in me for some days at a time. It's non-irritating; in fact, it can be very difficult to shit it at all without an enema.
Johnny