OK
I use Durabulls, they are made by vigortone, they are yellow plastic, have three pie shaped quadrents that hold 50# each, or you can put less
Hunny bunny ran over one with the dozer and it didn't do a lot od dammage still use it
Bulls will scoot them around when they are empty, but hard to break, they have a soft rubber disk on top, and the cattle and horses can't resist peeking under it and so on and so forth, they cost $99. and last for years, my oldest is 7 years so far, and the mineral gets no water damage
I have one in every patch now, but while I was gathering funds I just scooped them into the tractor's front end loader and moved them around
By far the best method for mineral feeding and no waist, and have not had much trouble with the deer getting into them