I think Vaping Zone super concentrates are the easiest to use!
My minimal DIY requirements:
nic
VG
PG
flavors
eJuice Me Up calculator
20ml syringe
5ml syringe
1ml syringe
30ml bottles
5ml or 7ml bottles (for test samples)
120ml bottle (for bulk base)
100ml graduated glass cylinder (for bulk base mixing)
Of course I have more DIY equipment
, but the list is what I actually use
98% of the time.
I mix 100ml of base (nic/PG/VG) and put that into a 120ml bottle that has a flip turret top cap. I use 5ml or 7ml bottles for test samples. Most of my mixes are 30ml, sometimes 60ml. Note that I do not use needles, pipettes or funnels; no need fer 'em.
I have no fear of needles, but they're just too fussy. Therefore I use syringes sans needles for flav mixing:
remove syringe plunger
place little finger tip on syringe tip
drip in flav or nic base or PG or VG in syringe top
place tip over mix bottle
remove finger, insert tip
reinsert plunger
slowly 'plunge'/empty
That's only one way to mix. But it's the quickest, most accurate and fuss free method
for me.
Ya don't have to spend a fortune buying DIY kits that have items ya probably won't use.
Good luck!