We had the same problems with DS when he was probably the same age?? (Terrible memory) He is 21 months now, and has spent the last 4 nights sleeping through (YAY) and is waking slightly soaked. 12kgs, in Huggies Toddler sposies, so last night i bought the walker ones. Will try them out soon and see how we go.
Woolworths had 2 packs for something like $25? So I got 1 pack of Toddler, 1 of Walker.