I have Ben doing a lot of reading on here as I'm still new and try to help where I can. I have came across a few post about the nipple water systems and started looking online. Seems to be expensive and I'm sure there are some people on here trying to save a dollar like myself. Here is a link to the nipples I just ordered. Seems to be the cheapest ones I could find and have free shipping. I haven't got them in yet as I just ordered them so I couldn't comment on the quality. I have also seen some plastic ones around but have Ben advised not to get them as rabbits will chew them up. Anyhow here is the link hope this helps someone out.
http://www.ebay.com/itm/170777441482?ss ... 2239wt_689
http://www.ebay.com/itm/170777441482?ss ... 2239wt_689