Eh, now makes me scared to go shopping in Centrepoint! I know, I'm so paranoid haha...
Sterilising tablets are used for cold water sterilising, like when u travel and got no means of sterilising, not even microwave. U can just drop the tablet into water, and totally immerse the items. By right, after taking bottles out from the sterilising liquid, you don't have to rinse again. Once u rinse, it reverses the sterilising, so to speak. But I still wonder if there's some kind of health hazard in the long run.