I ordered some 18350 batts from Provapes. When I got the package out of the mailbox I noticed it had a tear in it. When I opened it and took out the batts, this is what they looked like.
I contacted Provape and provided the picture. This is the response I received
Hi Donna,
Oh my dear! It looks like USPS did not handle your order very well at all! I am so sorry about that. I will have shipping send you a new order in a box this time.
There are two o-rings of the same size on the ZAP and one that is slightly larger. The smaller o-rings are the ones used to secure the tank in place and the larger one is for the top cap seal.
Kindly,
Cecilia
An hour or so later I got an email that my order had shipped
I'm just glad I didn't need the batts right away!
Oh... I asked about the zap o-rings because I took apart my zap to clean it today.. when I put it back together the top cap was extremely loose, unusable loose. I took it back apart and switched the o-rings and now it's secure (or as secure as it can be) again. I didn't realize that there was an o-ring specifically for the top cap and different ones for the tank part.

I contacted Provape and provided the picture. This is the response I received
Hi Donna,
Oh my dear! It looks like USPS did not handle your order very well at all! I am so sorry about that. I will have shipping send you a new order in a box this time.
There are two o-rings of the same size on the ZAP and one that is slightly larger. The smaller o-rings are the ones used to secure the tank in place and the larger one is for the top cap seal.
Kindly,
Cecilia
An hour or so later I got an email that my order had shipped
Oh... I asked about the zap o-rings because I took apart my zap to clean it today.. when I put it back together the top cap was extremely loose, unusable loose. I took it back apart and switched the o-rings and now it's secure (or as secure as it can be) again. I didn't realize that there was an o-ring specifically for the top cap and different ones for the tank part.