When your baby becomes a toddler, the NUK First Choice Learner Bottle with Temperature Control helps the problem-free changeover to independent drinking.  NUK First Choice Learner Bottle with Temperature Control shows at a glance when the right drinking temperature is reached and gives the assurance that the drink is not too hot. If the drink is too hot, the normally blue indicator turns white. Ideally, the liquid should have body temperature (37 °C = medium blue tone).  The NUK First Choice Learner Bottle has a soft silicone spout which is pleasantly soft and spill-proof. The integrated NUK Air System equalizes the pressure in the bottle and helps reduce colic as less air is swallowed. The clear silicone material is easy to clean and is particularly heat-resistant. It is free from harmful substances, boil-proof, odourless, transparent and has a smooth surface – all features that are important for a spout. The handles are ergonomically-shaped and have non-slip soft studs.