Boil some water (about 1 - 2 cups) with the sliced ginger.
Boil this mixture for 10 - 15 min., then let it sit for about 2 - 3 hours. You want it to be really strong. Meanwhile, juice your lemons.
Combine your ginger tea (remove the ginger pieces) and honey in a bowl. I used just under 1/2 cup, but the resulting drinks won't be very sweet at all. 3/4 cup makes them lightly sweet because this will make 12 24-ounce bottles later. That's just 1 tablespoon per 24-ounce bottle if you use the full 3/4 cup But, you choose.
Add your lemon juice to this and the salt.
Stir it until the honey and salt are dissolved. Then, add enough filtered water to make 3 cups total mix.
Now, fill up ice cube trays with it. It should make about 24 ice cubes (assuming your trays are 1 oz. per cube, which most are).
Freeze for a good 24 hours. Because of the relatively high sugar and salt content, they will not be solid like normal ice. They will be a bit tacky. That's okay! Just pop them out and throw them in a bag.