Actually ChuChu got 2 矽膠奶咀:人奶咀 & 十字奶咀, the former is much more expensive than the latter one, but my personal experience is no need to buy the 人奶咀 even though I use it to 補奶粉 as the baby can hardly confuse your nipple with the 奶咀, in fact I perfer the 十字奶咀 to the 人奶咀 as my baby tend to play with the latter by inserting the tip of his tongue into the space of the 人奶咀, its such a waste of money :;pppp: