Here are the instructions:  Get an Igloo cooler (I prefer the smaller one) and remove the valve at the bottom.  After that you get a 1/2" PVC nipple and screw it in where the valve was and put the black lambs nipple over the end of the PVC nipple.

You get an Igloo cooler (or something like it) and remove the spigot. Get a piece of plastic pipe (that is threaded at the end.  It comes in long pieces, so will have to cut it.)  that will screw in where the spigot was. (Lowes, Menards, and Tractor Supply have them.

Use a lamb’s nipple over the end of the plastic pipe and secure it with a hose clamp. Mix up



your milk replacer and put it in the cooler and replace the lid. This not only will keep the milk warm but will also keep the flies out. Replace the milk every 12 hours.  You can hang it on the fence or on the inside of the stall. Then it’s just teaching the foal to suck from it instead of the bottle.

If you can't find a small Igloo cooler anywhere. Use a Coleman 1 gallon cooler that has a spout on the top.

From there I took the cooler to Menard's and bought the following:
2 - 2" long x 1/2" diameter PVC threaded nipples
1 - 1/2" threaded PVC coupler
1- 3/4"x1/2" SPGXT PVC bushing - the 1/2" end of this bushing is threaded.

Finding gaskets was a problem - but I ended up buying 2 - 3/4" electrical union kits. Each kit has a rubber washer in it that will fit over the 1/2" PVC nipples.

Inside the cooler there is a flat area at the bottom where the valve would go if it had one. I drilled a hole through the cooler so it would come through that flat area inside. You'll have to use either a 5/8" or 3/4" wood drill bit to drill the hole because the outside diameter of 1/2" PVC pipe is about 3/4". I would suggest matching up the drill bit to your pipe before drilling the hole. Make sure you drill the hole high enough that you can fit the bushing on the 1/2" nipple on the inside of the cooler.

After drilling the hole - slide 1 of the 2" X 1/2" nipples through it. It should fit tightly and you may have to beat on it a little to get it all the way through, making sure you have plenty of thread showing on both the inside & outside of the cooler. Place 1 of the washers over the nipple on the inside of the cooler and screw the bushing onto it hand tight. Take the other washer and put it over the nipple on the outside of the cooler and then screw the coupler onto that side of the nipple, again hand tight. Then take a couple of pairs of channel locks and with one pair hold the inside bushing while you're using the other pair to screw the coupler on tight. This should draw both washers tight to the cooler body and most likely pull in the outside of the cooler somewhat. After this screw in the remaining 2"x1/2" nipple on the other end of the coupler and put the black lambs nipple over the open end. Secure the lambs nipple with a wire tie as tight as you can.
VOILA - you now have a orphan foal feeder!!!!!

If there is a slight drip coming from where the 2"x1/2" nipple goes through the cooler, put a bead of silicone caulking around it on the outside of the cooler to try to stop it. Hope this helps anybody else who has an orphan foal! REMEMBER: Replace the milk every 12 hours.  Thank you Russell Ellis!