Thumb Score: +12 Amazon [amazon.com] has 4-pk 8.4-oz Red Bull Sugar Free Energy Drink (Original) for $7.49 – $1.50 – $1.50 when you ‘clip’ coupons on product page – 5% when you check out via Subscribe & Save = $4.12. Shipping is free with Prime or on $35+ orders. Savings Apply $1.50 coupon (check and…