You can make "tea" from leaves of those berries and others like blueberry and raspberry. They have lots of anti-oxidants. Dry and crush the leaves to make steeping easy. I don't know what red fruit tea is, but many fruity teas are flavored with hibiscus or rosehips for a little tang. You could make a fruit syrup and add some to your leaf infusion for sweetness.
“The past is never dead. It's not even past.” - William Faulkner