these bottles are perfect. I reuse and clean my bottles a lot. The caps disassemble completely. The glass tube comes off, the twist thing comes off, and the squishy thing comes off.(sorry I don't know the actual names of them) When I put them back together they fit perfectly. I've had bottles where the glass tube comes out after its been taken apart and doesn't quite fit together like before because its loose. Not these babies. They're awesome. I will order more of these when I run out. I haven't had one break on me either when I drop them(happened a few times) These bottles are awesome. The 1OZ ones are just well made as well.

Whatever your craft or hobbie is and you have a need for a 60ml glass bottle, give these one a try. These bottles were exactly what I was look for. I wanted a 60ml glass bottle with a dark shade to it. I was also looking for a color other than amber. The bottles came on time and with no damage.
The shipping box was package just right to protect each bottle during shipping.
The bottles are the correct size, 60ml
I went with the blue bottles, the glass bottles are in good condition and the bottle is as dark as amber bottles.
If there was anything I would say that could be improved, it would be more color choices of glass. Offer lids as choice over the dripper.
Yes I know if I look around I can find those other items. But some do like on stop shopping :)

My bottles arrived well-packed in bubble wrap and 100% intact. As others have noted, the droppers, while long, do not reach to the bottom of the bottles (in my experience, these are somewhat higher off the bottom than 1 oz bottles... around 1/8 inch from the bottom center -- the bottle bottoms are curved upward slightly).

The glass droppers are well made (though the tip shape is different from other droppers I've seen) and the bottles are fine. My big issue is that the rubber top to the droppers is too small for the size of the dropper. As a result, it is hard to fill the dropper even 50% full. I have not measured the volume of a full dropper, but did verify (using a graduated cylinder) that the droppers do yield 30 drops/ml (which seems to be standard). I would give these 4 stars if the rubber tops allowed the droppers to be filled, and 5 if the droppers reached a bit further into the bottle.

Low quality bottles. Don't buy them. I bought this to store home made vape juices. I don't travel with them, I simply put them on my desk. One bottle broke, and the dropper glass fell off from the rubber. I bought bottles from different seller like a year ago, they lasted forever. This one is a crap. Avoid.

3 stars for average.

- The glass thickness is inconsistent from bottle to bottle as well as even within one bottle (you can see areas that are thinner or thicker).
- The plastic dripper caps are hot or miss with regards to machining (for lack of a better term). There are little pieces of plastic hanging off some parts and some are perfectly fine. Not a big deal but let's just say I wouldn't give a bottle full of whatever you're using them for as a gift if you want to represent your product as something high quality.
- Most importantly and my biggest gripe with these is that the dropper only draws up about half of the dripper length. I should've know just from seeing the photos since if you look at the photos you can see the plastic nipple and cap look small in proportion to a 60ml bottle - almost like they belong on a 30ml. Edit: I just compared one to one of my 30 ml bottle and the nipples te the same size. Only difference is the the glass dripper portion on the 60ml one is longer. That's an issue since the nipple size is meant to draw up from a 30ml bottle which is much shorter and they used that on these 60ml bottle which don't really work like they should. This might not be an issue for some but I personally transfer liquids from 60ml bottles to smaller bottles and the fact that the nipple only draws up half is a pain in the neck since it takes twice as long as it should.
- The cap back out of the threads in some. Major issue if these are going to be used anywhere other than a shelf since any movement or tipping of these might result in a huge mess from the cap unthreading. Even when they're threaded all the way down they will leak when topped onto their sides. That in itself says these are not air tight or sealed so that might be the biggest concern to some depending on what you'll be using these for.

Anyways, bottles are average. Not terrible and not good quality. You just need to figure out if the above cons I mentioned are relevant to your use of these and decide from there or are negligible for you personally.