The more variety of natural foods we have the less dependent we are upon such things.

Our modern cooks, confronted in the present crisis with restrictions in the number of foods which they may use, may find in bay leaves, nutmeg, allspice, and all their kind, ways of making acceptable the cereals which make a diet economical, the peas and beans which replace at least a part of the meat, and dried fruits and vegetables which save transportation of fresh or canned goods.
Tea and coffee are both flavors and stimulants.

They are used literally by thousands to give flavor to bread or rice.

Dependence on a single flavor is apt to result in a desire to have it stronger and stronger, and hence less and less wholesome.

This is a good reason for some variety of flavor; better tea one meal and coffee another than the same one all the time.