Here's one, which I created, recently. Materials needed...3" or 4" pvc,[4" works better and gives you more options], 1/8" x 3/4" galvanized strap, about 3' of length, a glass jug, a 5 gallon bucket, 6- #8x 1" selfdrilling screws.
Tools needed: Sawzall, drill, driver tip, drill bit, and tile wet saw with a diamond blade.
Using the tile saw, cut the jug, just below the curve...It's easier than cutting right on the curve,
Cut the PVC to desired height. A 4' length of 4" pipe will handle about 5 gal. of feed.
Cut the strap into 1' lengths.
Cut the bucket with about a 4" side...You can shorten it, if needed.
OK. here's the tricky part, which requires some experimentation.
Set the PVC into the center of the bucket and determine the angle to bend the strap. If you've got a sliding bevel sqaure, it would make a quick job, of this step. It must contact the point, where the botttom and wall of the bucket meets, for stability....Make the bent leg about 2-3" long...Bend, using a vice and hammer, or bend it over the edge of a sledge hammer, using another hammer. The angle can easily be adjusted.
Now, the tricky part is to determine how high off the glass cone, to place the PVC....Too close, and the feed will jamb up....Too wide, and the feed just dumps out.
Whatever the height, the edge of the bucket must be higher.
Predrill , with 2 holes, the short leg of the strap.
Attach to the PVC with self drilling screws, at the prescribed height.