I made mention of organic teas not green or black tea and I just empty the contents out. No staples, no strings just a paper packet in the ginger, chamomile, fruit or rose hip teas I give them. Hop, mint, bee balm - Monarda, comfrey etc. are simply taste treats for them and they seem to like the tasty addition to their daily feed.
Watch them outside as they happily go for the mints and other herbs when they have a chance. FRESH herbs is a useful ingredient and I add them as well. IMO they help build a stronger immune system and as I see it some of the weeds they eat are better than the empty Iceberg lettuce that we pay bucks for.
They certainly enjoy the basil, garlic, sage, mint and oregano that they get from me. Later I am sure they will feast happily on the nasturtium and other herbs that are coming into growth.