I called the 香港代理 of Pampers. The girl said the one in green + purple (or whole purple?) packing is made by Pampers but not be sold in HK markets. It's just 水貨 but not 冒牌貨 or 假貨。 It means this's really produced by Pampers but the 香港代理 doesn't take care if there's any problem with this. Similar to the 電器用品,there's no 保證 / 保養 / 售後服務 from the 香港代理 on 水貨。