Lids Do Not Fit When Roller Is In (Paid Full Price) [SEP] The lids don't fit right on any of the vials. I haven't really used any of them because of that but I did but plain Olive Oil in three of them just to see if the leaked or not and one of the three did leak oil the other two didn't. I left the oil in there for about 5 minutes and laid them on their sides which isn't a real, real leakage test because in real usage they wouldn't be lying still they would be getting jostled around at least a little but with the lids not fitting properly I have no intention of using them for much if at all so I didn't bother with further testing - next time I'll definitely look for a different company to buy this type of bottle.