Tried the Lucemill bottle with the cap from the YFTK refiller. Not a great fit, would work if you were stuck for a bottle but the YFTK refillers are so cheap you should just buy a load!
Before pictures, a few thoughts.
Using both the YFTK super soft squonk reservoir bottles and the very squeezy YFTK 510 refillers.
Good combination, so easy to squeeze all the air out of the super soft bottle and most of the time it was filled up with one squeeze from the 30ml refiller and also mostly without any juice loss (only once did I leave a small dribble on the top of the mod. For the right setup a great way to refill your squonker and every bit as good as the Parliamoitaliano refillers. As
@tootingyoda mentioned, be careful using the refillers with mechs, switch off mech or remove battery or fit an insulter on the refiller.
The YFTK 510 refiller bottles feel lovely and I am tempted to use them to also fill tanks or drippers or decant samples for friends because one single squeeze action empties 30ml unlike normal juice bottles (whatever type).
The Lucemill bottles are okay as juice bottles with a nice feel to them but the threads are not right for the YFTK refiller caps so not 100% juice tight, the Lucemill nibs are not great, prefer nibs from iBottles.
YFTK super soft reservoir bottles - so squeezy, anyone using a Drone should try them, such a contrast to the hard Lost Vape bottles but less capacity of course and when the YFTK runs out of juice it's too easy to press flat and blow a jet of air up through the atty which can result in juice flying off the coils and up through the drip tip like a geyser! Zero movement on door of Drone as all you need is a tiny squeeze even with your pinky.
Pictures, then links and prices:
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glug glug
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L to R 2 x Mussellini bottles (heavy caps and taller and do topple over more than YFTK), Lucemill with YFTK cap and YFTK bottle & cap
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As before but Lucemill on the end now
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Lucemill on left, compare threads
Tuttifruity supersoft refillers
http://www.tuttaltrofumo.it/it/home/551-soft-bottle-85-ml-.html 19 euro + postage = 17 quid + postage?
YFTK refillers (just as soft as the Pavarottis)
https://www.fasttech.com/p/7988100 for USD 4.30 + postage = less than three and a half quid (cheaper in packs of five!)
or here
http://www.3fvape.com/misc/16477-yf...tml?search_query=yftk&results=44#.WXEl34TyuJA for USD 4.49
Quality of both refillers and reservoir bottles from YFTK seems first class.