Doll to help with potty training ?

So we plan to do the "Toilet training in less than a day" with our 29-month old DD and in the book they recommended a doll that drink and then wets when you squeeze the tummy. I've been scouring the internet and it seems like the best one out there is by Corolle http://www.amazon.com/Corolle-Specia...pr_product_top
Review wasn't that great because the doll is leaking as you feed her and looks like a baby instead of a toddler. I will really appreciate any recommendation on doll to help with potty training. TIA.