Doctor Betti Dr. Betti Hertzberg Ressler is a Board Certified Pediatrician on staff at Miami Children's Hospital. Dr. Hertzberg developed the toilet training video "Let's Go Potty." She is the co-author of "The Doctor's Book of Home Remedies for Children." Potty Training Question: I have a 27-month-old daughter; I recently started potty training her. She is doing great she pees and poops in the potty. She still takes a cup to go to bed. This causes her to wet the bed. I need some advise on how to break her from the cup at night, so I don't have to but a diaper on her. - Jay Answer: Dear Jay, You're both doing great with potty training if you just recently started. At 27 months, it might take a while before nighttime dryness happens. Do one step at a time. Concentrate on daytime training. Accidents will happen. They are part of the learning process. When there are no accidents (or very few) during the day, your child will be more apt to be more responsive for the nighttime routine. Children want to please. They thrive on positive reinforcement. Don't be discouraged if it takes longer to control wetting at night. Every child has their own rate of maturity in this area. Sometimes a good alternative to a wet mattress and frustration is a diaper or nighttime pull-up. Be patient. Eventually, this milestone will be achieved. The rewards are great for both you and your child! If a cup is needed during the transition, it's fine! Eventually it won't be needed. Remember to only use POSITIVE REINFORCEMENT. Anything negative will only cause setbacks. Good luck with potty training! Dr. Betti Also see: More about potty training Are vaccines safe? Ask Dr. Betti your questions This information is not intended to be a substitute for visiting your pediatrician. If you or your child has specific concerns, you should see your doctor for a diagnosis and treatment.