I can recall Patrick Jane having a tea-break in many (most?) of the episodes that I've watched.
I suspect that in many (most?) cases it's a tactical move, nevertheless I think that he really enjoyed his cup.
Did Mr. Jane ever discuss the particular brand(s) he most enjoys?
I don't recall a tea bag shown in sufficient detail to think "product-placement", but I may be wrong…
On another note, not related to product placement: had Jane tea bags in his pockets as a matter of abitude?