It's interesting to me to discover the technology surrounding babies. For instance, the bottle. it has 5 parts: the body of the bottle, the cover, the nipple--obvious enough. The bottom is not solid, and there is an inner (latex?) diaphragm that is domed up a bit--this doesn't let anything leak out the bottom, and I imagine with the negative pressure of sucking, allows enough air in so that the milk can come out, yet without coming out too quickly. Nice. Elegant.
Then comes the technology for cleaning the bottle. I intuited the bottle brush immediately--don't remember eve seeing one and knowing what it is, yet when the glass scrubber didn't fit inside it was obvious pretty quickly. Does it really need the swivel handle? Perhaps with having to clean bottles for every-three-hour feedings this would save the wrist over time. Hmmm. What's with the little nubby spongie thingie at the end? Oh--would that be the right shape and size to clean the bottle nipple? Sho' 'nuff.
Then the making of the formula. Two level, unpacked scoops. Hm. Can't find the scoop--found it with a fork. Hm. What an odd shape--so long and thin--why is it shaped that way? I'm sure there's a good reason; I just can't imagine why. [Making the formula] oh. That's why--if it weren't this narrow, most of the formula wouldn't make it into the bottle. Boy, these folks have had a number of years to figure this stuff out, eh?