I've been taking Iodine for probably about 7-8 years.
Lugols.
I have yet to find a dropper that doesn't have the rubber react and deteriorate in the presence of Iodine.
The rubber gets hard and pieces fall into the iodine. Then the dropper bulb will develop cracks in the bottom and I notice that the Iodine will outgas through the cracks and becomes lighter in color over time. Meanwhile anything nearby the dropper turns yellow.
Does anybody know of a dropper that can survive the nasty environment? I've tried many kinds already.
If not, would you all be interested in replacement bulbs that are made out of a biocompatable silicone? I can have these made if necessary.