Nuk first choice43 bottles are designed to be used with first choice43 teats the first choice43 teat replicate a mother39s nipple during breastfeeding and features the special orthodontic asymmetrical nuk shape an extra wide lip support and new extra soft tip to fit baby39s 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