Supplement Hunt offers the USP Labs Jack3d Advanced Formula 45-Serving Pre-Workout Supplement in Fruit Punch for $21. Apply coupon code "JACK45" to get a second for free. (The second item will add to your cart automatically.) With $5.99 for shipping, that's tied with our mention from a week ago at $70 off list and the lowest price we could find. It features 200mg of caffeine per serving.