Milk mustaches are the cutest. Even better? When your kiddos wash down their drink with colorful cups that are safe for all. Biobu\'s small cups are made of biodegradable bamboo fiber with a 100% food-grade melamine binder, and are BPA-, PVC- and Phthalate-free. Stack 'em in your cabinet and mix-and-match 'til your heart's content. Uniformity was never your thing, anyway. Sold in a set of 4.