The newest bottles that are coming out in the last year of so are white HDPE bottles with a controlled dropper top. They have a slightly smaller drop, so it takes more to make a mL or cc. However, they're a lot easier to control and the drops are consistent. That's where some of the confusion lies. Remember, Jim was writing his book for a couple of years before it was finished and published, and he's had an even newer one published than the one you are referencing. The older bottles (the green plastic and blue plastic with the 2 types of droppers) were very hard to control. They gave inconsistent sizes of drops and sometimes the fluid would not come out at all, and then all of a sudden in a stream. As vendors move through their stock of the older bottles, I think we'll start to see the newer ones coming out.
Pam