If you are inclined, try completely drying the capsule, filling it with Potable Aqua tablets, as full as possible, then place the capsule outside someplace completely safe from fire (under a rock?), wait 3 months. Open and note any corrosion, flames etc.<br><br>Each Potable Aqua tablet is supposed to liberate 4mg of iodine, so a full capsule (say 25 tablets) will only contain 0.1gram of iodine. Magic fires generally are using 50+ grams of elemental iodine and a pile of aluminum shavings so I think it is highly likely that these capsules will not violently react.....but be safe above all things.<br><br>