I bought a japanese one made one from Seiyu in Shatin and my friend also gave me one as a present which I know she purchased from Mon Be Be in ocean terminal - both of these do the exact same thing - ties the child to a chair/highchair. I prefer the one from Mon Be be because it has a non-slip base and i think baby is more comfortable in it. I think Mon be Be still has a lot of stock. Costs around HK$2XX. I find it very, very good.