Dolphingal, yup, bumgenius is good, I have a few of the pocket type. THe other that is sim is called Happy Heiny's. I use these when we're on the move as they're the synthetic type so chances of leakage is low. At home I use tiny tush which is the cotton type. Feels soft and very comfy (at least I imagine so!) on the buttocks, haha! Reminds me of those tv ads for fabric softener where the lady will put the towel on her face, haha!
Newmummy, sorry, don't have mamy poko anymore. If you want I can buy from the medical hall at Pasir Ris, the prices there tend to be lower than NTUC, Giant etc. Or try Ang Moh at blk 85 (I think), heard that their prices are quite reasonable too?