These cute bottles will help your baby have fewer colic symptoms. These are designed to reduce gas, reflux, and discomfort. Accepted by babies, recommended by moms. Breast like closer to nature nipple. Heat sensing strip turns pink if bottle is too hot. This set of 2 bottles are new in box. The boxes are beat up. Please see pics. Pet friendly home. baby bottles boy blue anti colic like mom breast anti colic heat sensing slow flow nipple