Nuk first choice bottles are designed to be used with first choice teats the first choice teat replicate a mothers nipple during breastfeeding and features the special orthodontic asymmetrical nuk shape an extra wide lip support and new extra soft tip to fit babys mouth perfectly simulating breastfeeding as closely as possible so true to nature that most babies hardly notice the difference the latex material is popular with many parents because it is softer and more flexible which