A beautiful bottle of thick glass, very practical capacity, with graduations in ml but in ounces UK and US. The nipple is the feature I like most about this product, its shape seemed both appropriate, well thought and practice. Quite impressive. Psychological effect or not, I can not say, but I have found fewer referrals ... I see only one drawback: its weight, therefore already empty. But given its quality, aesthetics and convenience, it deserves its five stars! Tested and passed !!!