Terrible bottles. I bought 100 thinking they were like the usual plastic bottles I've bought e-juice and flavourings in, and I was quite disappointed when they arrived. They also took 6 weeks to get here, directly from China (I bought them on amazon.ca).
The caps were especially disappointing... first that little tamper-evidence ring doesn't really work properly (gets damanged screwing the caps on), and the caps don't fit the bottles straight either. I have some better, child-resistance caps that don't fit on these bottles. Also the drip nozzles that come with these don't fit any other plastic bottles.
In the batch of 100 that I got at least a couple of bottles were deformed, unusable.
1/10 would not buy again.
I've started buying these, good quality and all the sizes use the same tip/caps, so you don't have to mess with a bunch of different ones.
they don't have the nice tiny dropper tip. kinda PITA but they'll do
I just bought a handful of bottles from ecigexpress.com and they were perfect. The price point is a bit higher and you may be able to find better. However, u/abdada is right that the drop tip on those is not good for e-juice use.
http://www.ecigexpress.com/diy-e-liquid/mixing-tools-safety/e-liquid-bottles.html
Everyone who DIYs needs at least 3 harsh lessons on paying discount prices for DIY supplies.
"Wow, this nicotine is super cheap"
"Dang, I can't believe these glass bottles are cheaper than plastic!"
"47,215 feedback on eBay must means this Chinese company sells good stuff quickly!"
Oh my last 1ml luer lock just broke good thing the scale is coming in two days. Better order some pipettes. Wow only 1.38 for 100?! And free shipping?! They came by fucking boat from China and took 6 weeks AND they were .5ml. Always check shipping time and other details lol
For only $6 more you can buy some way nicer quality imo, heres the link.
I've ran through 200 of the 30ml with no problems. The thicker tip makes filling tanks harder but most everybody I sell to uses drippers.