Chemical reactions and catalysts. A chemical reaction involves a chemical change, which happens when two or more particles (which can be molecules, atoms or ions) interact. For example, when iron and oxygen react, they change to a new substance, iron oxide (rust).
It's important for parents to start weaning babies from bottles around the end of the first year and start getting them comfortable drinking from cups. The longer parents wait to start the transition, the more attached kids become to their bottles and the more difficult it can be to break the bottle habit.
FAQ: Baby Bottle Weaning. Weaning your child from a bottle may be a challenge. Once the decision to wean is made, consistency is essential and all caregivers should be aware that your child is transitioning from the bottle to the cup. Remember that weaning is usually a long, gradual process.