James,<br>I think the reason you had problems with the aluminum foil getting holes at the creases was that you carried it in your pocket rather than in a tin. One of the reasons to carry your gear in a tin is to protect it. Likewise, condoms carried in wallets flatten when subjected to crushing pressure and end up creasing. This weakens them and makes them more likely to break. In a metal or plastic tin of sufficient strength to hold it's shape and protect the contents from abrasion, foil and anything else should be fine. Just make sure to pack the contents with tinder to keep items from sliding around inside.