If you're going with a 5x7 Aloksak, you might think about using the small (8 oz) Sierra Cup. It is flatter than a soup can and will fit into a 5x7. It is Stainless steel so you won't have to worry about rust and that 5x7 Aloksak can be slipped into a belt pouch of similar size or a cargo pocket on pants jackets, etc..