What is the safest way to carry denatured alcohol for camp stoves? Is there even any danger? I just don't want it to leak all over my pannier's contents. I don't think there's much of an issue with fire with the lack of a flame.

Right now I have two bottles, one Gatorade one and another bottle with an adapter. Both have o-rings. Aside from a freak puncture, is there any problem with this set-up? I imagine the contents can get pretty heated over a day. Thanks.