The supplier is very serious, the vials are packaged very well, and I confirm what was said by one commentator before me, when you open the envelope, odors are already emerging even before you open the bottles.
A notice is delivered with the ordered oil.
I have benefited from free delivery and supplier even gave me a bottle of essential oil that I had not ordered, so a big thank you to him for this delicacy.
In conclusion: it is an effective product and a super serious and friendly supplier.