i used alvita brand senna (100%) tea
there are no staples, the paper is oxygen bleached
you can find it online or in a health food store easily.
it doesnt taste great so i put some maple syrup in it.
also i only needed to take one of those every couple days. i brewed it in those little coffee cups in the microwave. like the ones that would fit on a saucer that came with a set of dishes. so you really dont have to drink much at all.
it always kicked in within 4 hours too