Function of these is the same as for the plain column drinkers above, but with the added feature of a carry-handle incorporated. This entails not just a handle, but a more complex dish-attachment mechanism, which enables the drinker to be easily lifted and moved, without coming apart or losing water. Well worth the extra cost if you need to move the drinker regularly. Note: These drinkers are not UV resistant. Try and keep out of direct sunlight.