Oh, am I relieved to find someone else going through what my husband and I have been going through for what feels like forever now! Me and my husband gave our daughter a bottle a little bit in the very beginning and stopped and only breast fed for probably the last 9 months, exclusivly. I wish we would have kept up on giving her a bottle at least once a day because now she wants nothing to do with any other form of feeding. Well, I take that back, she will do o.k. for a short period then she will go on protest and not drink basicly anything for awhile! I had my gall bladder taken out 6 days ago and was going to go right back to breast feeding but there was NO WAY I could have with the pain I was in and by the time I was well enough to go back to breast feeding she was already doing somewhat o.k. what her sippy cup so I don't want to confuse her. Not to mention the HARD work my husband has done in trying to get her to take some other form of feeding would go completely down the tubes if I started back agian so, no thanks! What I'm saying is don't be to hard on yourself. Yours is 18lbs? WOW! Ours is 11 months and just a tad over 16 lbs. So on top of her not really drinking, she'll eat a TON of baby food though, she is under weight and the Dr. is constantly concerned about her weight. All we can do is keep trying and keep praying and this will pass and we will be laughing with our children someday while sharing how crazy we went on the internet and with our friends because they would NOT eat! I don't know about you but my towel is thrown in, my little 11 month old angel has KICKED MY BUTT! When they get thirsty enough, I guess they will eat. Let me know if you find something that works! Thanks!