The alcohol based tinctures have the same shelf life as any 'liqueur'...indefinite.
The herbal/powder blends have a shelf life of up to two years, if stored in a dry/dark/cool place (longer if stored in the refrigerator or freezer)
If you're going to store any of the powders for more than a few months, switch them to glass containers with tightly fitting lids (canning jars are perfect).