You can keep your mask temporarily and use it again later. So, remove your mask properly and wash your hands after using a second hand mask. Store it in a very dry, breathable bag, like a paper fabric bag, to stay it clean between uses. When reusing your mask, confirm to stay the identical side facing out.
If you're removing your mask to eat or drink outside of your home, you'll be able to put it somewhere safe to keep it clean, like your pocket, purse, or sack. Be guaranteed to wash or sanitize your hands once you have removed your mask. After doing so, put the mask back on with the identical side facing out. Just make sure to wash or sanitize your hands again after putting your mask back on.