Just a note. You don’t need a vacuum sealer, suction style(food saver) or chamber style for dry goods if using oxygen absorbers. Neither sealer type will remove all of the air, hence not all of the O2, from between your rice/beans/etc. There will always be some left and it is that O2 that will cause degradation. With Mylar bags and O2 absorbers you only need to squeeze as much air out of the bag as possible before sealing(can be sealed with a clothes iron or even your wifes flat iron on small bags). If your seal is good and you used properly sized O2 absorbers you will actually see the bag ‘suck’ in after a few days.
While Mylar bags are best, ‘foodsaver’ type bags will work for dry goods IF you also include O2 absorbers. Also note that Mylar bags don’t work well with suction style vacuum sealers. The clear ‘foodsaver’ type bags have one textured side allowing air to be drawn out before sealing. Mylar, being completely smooth, make the sealer think there is a vacuum inside the bag when there actually isn’t. There are some workarounds such as using thin plastic with ridges in it but they are generally a giant P. I.T. A..