The Pop & Go pacifier features a built in case. Whether in a bag or dangling from a pacifier clip - just a quick pinch and the nipple tucks away and is protected from unwanted surface contact when you and baby are on the go. ""Pops when drops"" feature is available for 0-3 month size. Designed to hold its position, even when baby plays with it or takes a break. Ideal when paired with a pacifier clip, simply pinch the sides to close it while baby wears it. 100% silicone. No lead, PVC, BPA, latex or phthalates. Dishwasher safe.