The most common way people aim to absorb iodine is by adding drops of lugols liquid to at least about an ounce of water. We really don’t need much water to dilute most amounts of iodine, but we also want to be able to help it down our throat.
Some people mix it with a lot of water and drink it slowly through the day, others add a drop directly to their mouth and chase with water, or adds a few drops to a small amount of water and chases it with water.
The idea is to consume iodine at some type of dilution so we don’t possibly burn the sensitive skin of our mouth or throat.
Most of us can handle a drop of 2% in our mouth without it burning. But a drop of 5% could potentially burn us. Some of us are way more sensitive to this than others. There are a few other areas that are rather sensitive to iodine, but our mouth and sinuses are two of the more sensitive ones.
I personally add various amounts of iodine to about 1-2 cups of water.
Sometimes I soak various body parts in iodine water or apply iodine directly to my skin. More info about transdermal applications here https://whyiodine.com/transdermal