Duo has glass on the inside for purity and plastic on the outside. INVINCI-GLASS shields milk from plastic. Long-lasting durable and breakproof. Intuit-Latch nipple positions babes tongue and lips for an intuitive latch. Anti-Colic valve vents air way from nipple. Dishwasher bottle warmer and electric sterilizer safe. BPA BPS PVC & Phthalate -free. Bottles made in the USA. Includes: (3) 5oz + (3) 9oz Duo Bottles w/ Stage 1 Slow Flow Nipples. (2) Stage 2 Medium Flow Nipples. (2) PhysioForma 0-6m Silicone Orthodontic Pacifiers with sterilizing case.
