hi Hbohm,
yes, my chicks were about 3 weeks when i introduced the vertical nipples. the chicks played w it as if it were a toy...
clean water, yes,, but WET bedding!!!
looking for another alternative. i think i've decided on the cup waterers and/or the 'bucket-in-a-bucket' technique (cut holes in the sides of a larger bucket, n have a smaller container inside of it that gravity feeds the water through holes at the bottom of it into the bigger bucket. it's not dirt-free like the nipples, but a great compromise if you decide against any nipples)
hope this helps. have you tried anything else?