I have used both vertical and horizontal nipples. Like them both very much more than an open container of water. The biggest plus is that the chicken's water stays clean. I live in NW Montana and our winters can be rather cold. I use horizontal nipples, an 11 gallon clear plastic tote, and a stock tank deicer for my water system. Water is kept outside in the run. Stayed thawed even when the temperature went down to -22. The best part is that the water only needs filled once a week or so.
I did have to replace my tote this year after using the old one for 3 years. It started leaking. Was easier to get a new tote than try to figure out where it was leaking.
Some people say their chickens are not able to learn to use the nipples. I have used the nipples on 4 or 5 different batches of chickens. I put the nipple waterer in with them, take out all the other water sources, and leave. I have never had a chicken not learn to use the nipples within a couple hours. One time it was after dark when I put young pullets into a coop. When I checked on them at 7 am they were all getting drinks from the nipples. Before I got those pullets they had been drinking from a dog dish.
I did have to replace my tote this year after using the old one for 3 years. It started leaking. Was easier to get a new tote than try to figure out where it was leaking.
Some people say their chickens are not able to learn to use the nipples. I have used the nipples on 4 or 5 different batches of chickens. I put the nipple waterer in with them, take out all the other water sources, and leave. I have never had a chicken not learn to use the nipples within a couple hours. One time it was after dark when I put young pullets into a coop. When I checked on them at 7 am they were all getting drinks from the nipples. Before I got those pullets they had been drinking from a dog dish.