Perfect in every way!
LOVE these roller bottles.  This is my second purchase of this particular brand.  I have purchased others through Amazon but after comparing quality this is the only brand I will be using.  These are made of cobalt glass, they are not tinted or painted blue, they are the real deal.  The plastic roller fittings work perfectly.  I use these for making essential oil rollers and am very pleased.  People often say not to use plastic with citrus oils because it will degrade over time, I have had no issues with leaking or loss of quality with my rollers.  All my oily friends also use these rollers without problems.  I have used rollers with steel balls and the balls have always fallen out resulting in loss of expensive oil and often ruining of whatever it spills on if mixed with a carrier.  These are my new go to roller balls and the only ones i'll use in the future.  Now if Amazon could offer them in larger quantity it would be perfect!
Rating: 5 stars