ummm, i think you have 7 days once the small vial is mixedd into the big one to use it otherwise it could not work. but i opened one and tested it last night then a few drops from it again this morning, like i didnt use the whole thing or even close to 1/3 of it, plus, i bought a second bottle for my actual test so i think ill be good to go. i wanted to test it on 3 different brands of testers, it passed with flying colors on the most high tech one i could get my hands on. (which came from a clinic my friend works at) it really was the most advanced thing i ever seen, not like the cheap little dipstick ones. but the opened QF bottle passed on all 3.

i also have a pill ive yet to try but im gonna load up on as a backup , its aparently 5 times the potency of the "strip" drink.

i would stay away from the drinks, ive heard alot of people say that, and from my own testing here at home i found it to really be a hit or miss scene. and we both know u cant go in there not knowing, cause if ur half as trippin as i have been for the past week u want to know before you go.