I've had den's cold-brew iced teabags and I can say they are superb. I stick them in a 20oz Aquafina bottle, and it churns out a VERY potent brew. Might be best suited for a much larger bottle, but I rather love the potency. I can drink down half the bottle, then add more water if I please. As blasphemic as it seems, I may grab some of the flavored ones when summer rolls around.