This two-pack bundle of Dr. Brown's Milestones Cheers360 spill-proof toddler cups helps babies and toddlers transition to big kid cups. One 10 oz/300mL cup has a narrow, easy to grip shape while the other 7 oz/200mL cup has handles for little hands. Both feature a 360-degree drinking edge and clear silicone valve so kids can sip from any side without leaks as they learn. The valve also lets children see inside while helping build motor skills. As skills improve, simply remove the valve to convert cups into open-top big kid cups. With a three-piece design, these BPA-free cups are easy to assemble and can be cleaned on the top rack of the dishwasher. The translucent sides make it easy to see when a refill is needed. One cup's slim shape assists grasping while the other reinforces tipping and drinking with handles. Together they provide a progression of features to help develop independent drinking abilities.