DSD, a word....Follow

The amount of caffeine in a standard cup of coffee is about 100 milligrams. It has the density of a bit more then water, so this translates to a volume of a tenth of a cubic centimeter (one cubic centimeter is about the volume of your pinky finger covered by fingernail). This is a macroscopic amount. You could easily see it. So caffeine isn't something which an invisible amount will effect a person.

Even if you were giving the baby a drop of coffee per morning, it is such a small amount, about 0.3 milligrams (one drop, about one milliliter out of a typical 300 milliliter cup) that it is unlikely to have any effect.

I guess the caffeine could percipitate out of solution and form a film which your brush could transfer. I think it unlikely.

What was your age again, Elinda? :-P

My 16 month old takes sips of my coffee and licks the tops of my beer bottles. Babies are just little people, he/she probably breaths in more caffeine than he/she would get off of the bottle brush. Tell your wife not to worry so much. My wife was much the same until she realized that everything I was telling her about babies was turning out to be true, now she doesn't worry so much.

When I was little (like 1-3 years old) we lived next door to my grandmother and great-grandmother. Of course I was at their house more than my own, since they lived in a huge old house with lots of closets I could wreck and a dirt basement full of Depression Era junk I could go through.

I owe my caffeine addiction to these wonderful ladies, since they used to give me coffee to calm me down.