As there are no chemical additives involved, these breadsticks will keep nicely for a few days in a sealed plastic container, but may become a little stale. To revive, just re-heat for a few minutes and they'll regain their original crunch.
Metric kitchen scales are an inexpensive yet invaluable gadget to enable accurate measurement of ingredients. Store them upright in a cupboard or over your worktop and they'll only take up a tiny bit of space. Click
HERE for the ones I use (UK Link). For U.S. option click
HERE.