:wave:
As far as I can remember off the top of my head, Twinings is fine, so as long as you pick something bunny safe that shouldn't be a problem.
I have been using Tesco mint infusions.
What I look at is the ingredients. You want all the ingredients to be bunny safe, but I tend to use those that have only the ingredient of what I want. For example, my Twinings and the Tescos one say ingredient 'Peppermint'.
In true teas, if you look at the ingredients on some, they have a whole list of stuff sometimes, that you wouldn't expect to be in a tea of that flavour. This is the area i'm careful with.
If you check the ingredients and they are rabbit safe then it should be fine