A burette does make sense. Great way to get a controlled amount of fluid. And could have a set up with your most used flavorings. But as you said, it wold be much more expensive not counting breakage. And quite honestly, the glass would just be sort of a "treat" to work with again. The plastic pipettes are perfectly adequate for the purposes we are using them for. It's not like we are compounding medicines.....lol. I get along just fine with the plastic, but could not resist mentioning glass when the "question" was posed several posts ago about "what else would you like to see carried". Thinking about glass now, it would most likely be more trouble than it would be worth.
Good point on the nicotine sol'n. Dilute it down to your regular working strength and then you are done handling it. You are certainly on the right track. I don't care how long someone has been doing this, like anything else, you can always learn something new. Can't get complacent. That's when accidents happen.
Ordering flavors is so hard, yet fun for me. She has so many to choose from from and the combination of different ones makes it even more fun. I just like to look through the selection thinking of what would go well with what. (sort of a silly sentence there...lol). But I think you know what I mean. DIY is one of those things that you can work at for years perfecting that perfect juice for yourself. Great fun!!