These Sigg boxes are great for travel and camping. They are durable and lightweight. We carry an asthma inhaler and meds in one while backpacking. I have 4 of these and don't regret the expense because they are so useful and well made.
Lasted an entire school season, and will use it next year, unless my son gets hungrier. A juice box/drink, one sandwich in a plastic tupperware case, one small chip bag, and some fruit fits in it with no room to spare. We enjoyed engraving a name on the flat bottom. Gets a little scratched, bent and dented but we just bend it back and it keeps going like those old aluminum canteens. No clip problems here, except little rubber pieces in each clip fell out the first week but aren't needed anyway. Most importantly, my son thinks it is cool.
I bought this box a year ago. I store my valuables in it so they will be protected. The box has a gasket in the lid so it appears to be waterproof as well, but I have not held the box underwater to test it yet. It closes tightly with side clips and will keep your items secure. The box is made of strong aluminum which will prevent the contents from being crushed. It is a great little survival storage box.