When you have to boil your water in order to ensure it's drinkable, it's nice to be able to add some flavor. Particularly if it's cold and the heat is out.
I always have at least a 6 month supply of coffee and coffee filters for a year. We have lots of chicory growing wild, so I will be able to dry and grind the roots to add to the coffee and make it last longer.
I raise rosa rugosa which has marble sized rose hips for rose hip tea which is very high in vitamin C. Don’t forget the dandelion greens-when they appear in the spring they have lots of vitamin c too.