0+ M. 10 oz (300 ml). New. Baby controls the flow for colic-free feeding. Unique nipple design. 98% baby acceptance (based on Market Research, 2019. Tested with 145 bottle users. Anit-colic air vent. SafeTemp indication Changes color when milk is too hot. Unique Nipple Design: Baby controls the flow of milk depending on their suction strength, for comfortable colic-free feeding. Anti-Colic Air Vent: Coli-free feeding helps reduce and spit-up. Safe Temp: SafeTemp Indication: Changes color when milk is too hot. Shaped Like Mom: Same shape as moms nipple during breastfeeding. NUK.com. 1-888-Nuk-1238. BPA free. Assembled in the USA with parts made in USA and Germary.