Thanks everyone for the replies, so far it’s assumed that adding nicotine sooner or later may just be a matter of personal preference.
I have some doubts but I have no experience.
In the meantime I found a nice discussion on another “competing” forum (which surely many know and frequent).
I hope I’m not infringing if I post the link here, but it looks really cool.
Can i post the link freely?
Bummer that I don’t work in a lab anymore, I am browsing the regular net now since I struck out on ebay and Amazon. I have some of those Plastic Dispensing Bottle Graduated Measurement but they are only 250ml’s. Browsing and shopping time! 
You are the creator of this post, you can post whatever you want.
Look for condiment bottles their about 10$for 2. Amazon won’t let me link from my phone.
That will be my next step if I strike out on the web for 500ml graduated measuring bottles with a thin tip like shown in your photo. Thank you!
@ZigZag I typically mix everything up at the same time, as I’ve found no real differences in the end result. The ONLY time I do NOT add the NIC, is to my large One-Shot bottles which are recipes that I make often, and it saves a LOT of time, having ALL of the flavors in say a 120ml bottle, pre-mixed. Then I add that into pg/vg/nic.
The minute you open the working nicotine bottle it’s oxidizing. Doesn’t matter if it’s in a mix or sitting on your desk waiting to be added. The faster you use up the better. The PG your adding is small compared to the flavors taste won’t be affected by that much from PG base nicotine.
I always add the nic when I am mixing a recipe, even in tests and larger mixes. My large (500ml) custard mixes steep for months with nic in them and I have never had a problem taste wise…
@KC111 this has been an ongoing “thing” for quite a while. Why waste NIC if you won’t like the recipe ? Fair point. I use NIC in all my testers, SFT’s, One-shot tests, etc., because NIC does have an effect on the mix. It can be hard to quantify it sometimes, but for me, I want to test the way I would vape it.
NOW, with that said, if you are mixing up 20 rando recipes just to see what you love/hate, it can be wasteful to tossing NIC in every one, BUT, it’s up to you, your wallet, and your tastes.
That link from LB is something very similar to what I use now, and the twist cap is the problem for me because my PG comes out too quickly. I like what @rcleven suggested that has a tighter flow from the spout. I also like the measuring units on the bottle, I just wish this brand came in 16oz, but I don’t see any at the moment. 8oz bottles I do have this option in 16oz…16oz bottles.
Anyway, thank you @SessionDrummer and @rcleven for your very helpful input.
16oz
Do you think the tip is small enough that the PG won’t come rushing out of this one? If not, then I will get the 8oz one.
I have been mixing batches with Nic and 0Nic for a few months now.
There definitely is a visual difference between including or excluding Nic when mixing.
I cannot compare the difference in taste as I am unable to vape Nic anymore and I didn’t think to try before I stopped using Nic.
I can say flavour wise that I have not adapted my recipes since I moved to 0Nic; to me there is some change in the flavour compared with Nic but that may be due to the removal of Nicotine on taste receptors?, adjustment of draw, wattage etc and addition of heat additive for increased throat hit.
The two bottles on the left were both mixed around 7 weeks ago - left 0Nic, right 3mg Nic.
The two bottles on the right were both mixed 1 week ago - left 0Nic, right 3mg Nic.
All bottles are mixed with the same % of flavour and ratio of PG/VG (I add flavour first and make up a pre-mix of Nic/PG/VG to top the bottle up to the correct weight).
I previously always used Nic when testing (10ml - 30ml) because
[quote=“SessionDrummer, post:39, topic:267086”]
I want to test the way I would vape it
[/quote] 
If it were me, I would add nic when mixing. If I was making large batches for backup/storage I would not add nic until closer to the time it would be used.
Do the 16 oz bottles. Shouldn’t be any different than having ketchup in it. It’s only $.60 difference. Less refilling means less chance to spill from the gallon jug. Make sure they’re food grade.
Thank you, I do like the idea of a slower drip rate with a scale to read. Appreciate the input.
Don’t thank me till the bottles work for you. Hard to tell how they will work from an Amazon page.
Great info, thank you.
This has to work better than the twist top bottle I have that I got the VG/PG from River Supply in. I just refill those but I can’t seem to slow the flow when I am mixing. That PG comes rushing out like a waterfall.
True, but you suggested the condiment containers, so thank you.
