ELI5 Orange Juice - how is it economically viable?

It takes a dozen oranges to make a single glass of OJ, so how is it economically viable? Why does Tropicana taste different to Simply Orange if they are both 100% orange juice? Some people say orange juice is as unhealthy as soda - is this really true? Why does orange juice taste so horrible if you drink it right after brushing your teeth? ... we explain like I'm five Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: resurrected5yearold, notwutiwantd, pure_opinion, toommyschoolbruh, krescendi, illogictc, fatalbert491, some_toast_, lithium, peregrine4 and myinquisitivemind To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter: https://www.twitter.com/eli5ThePodcast/ or send us an e-mail: [email protected]