Does storing multiple coins in one Ziploc damage them

The title pretty much says it

I am thinking to store them in one bag to avoid confusion, but I am worried that it might affect their condition

Will an XF coin turn into VF due to this

Please advice me

Damage is caused primarily by movement.  Providing two coins are put together or pulled apart carefully, I see no reason that they shouldn't stay in the same condition, providing they are more or less made from the same material.  

it might have pvc which is harmful for coins, other than that i dont really know

Thanks for your advice @LDC63 @yarnmisery