once my DD was as dry as your bub is NOW, i got her some blueberry minky trainers, put a brollysheet (mattress protector) on the bed, and that worked really well. The rare times she wet, the blueberry trainer caught the majority of it, the brollysheet caught the rest.

If your DD is staying dry over night sometimes, that's the first sign of toilet training.

i think i had three night trainers, and two brollysheets (one for the bed, one to put on the bed if she wet). that's all we needed.