Right now all I have are liters of 100 mg nicotine, 1 oz 30 ml amber glass bottles with euro droppers and priority boxes. I'm not ready to DIY ejuice. So for now I just want to transfer nicotine to the bottles and put in freezer. With that in mind, what is the best method to minimized the liters' exposure to air and what basic tools will I need. I thought a funnel but the bottles are dark so unable to see if measurement are correct.
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