Review on Vivaplex 6-Pack Amber 10 ml Glass Roll-on Bottles with Stainless Steel Roller Balls & Dropper - Premium Quality for Essential Oils & Perfumes by Megan Rogers

I was skeptical about these bottles because some reviews said they were rubbish, but I gave it a try anyway. Lo and behold, they are perfect! In fact, some of the rollerballs were a bit stiff at first, but it took me absolutely no effort to get them to move: just a little pressure with the pad of my thumb and all 6 turned gold. Inserting balloons into bottles was easy. I had no problem using excessive force and nothing broke. I just slipped it into the neck of the bottle, made sure it was level, applied incredibly gentle pressure and they popped out right away. The reason I'm only giving 4/5 stars is because the caps for these bottles aren't perfect. matching the threads of the bottles themselves. That's almost right, but not quite, and so it's easy to mix them up. Even if you are careful, you can move the cap and feel the threads bounce slightly. But when you screw them on tight (within reason, of course) they're more or less what they should be - just a little crooked, but that seems more of a cosmetic issue than a functional one for a true Type A. For the price (and also because I use it for my personal perfume application and not to sell the product) I'm happy with it!