1) Thyme and lime zest
2) Vanilla beans
3) Cinnamon quills , allspice , and orange zest
I am putting each into Grolsh Bottles with Vodka to the bottom of the neck of the bottle
The question is the bottles have a neoprene washer on the bottle seal , which will not contact the spirit
I see that a lot of spirit bottles has a plastic seal in the screw cap , or just a plastic cap ,which does not come in contact with the spirit
actually I have just looked at my spirit bottles and most of the caps are plastic

should I be concerned about the plastic question