Amazon has the 2 Fl Oz SweetLeaf Sweet Drops Liquid Stevia Sweetener (SteviaClear) for $4.99 - 5% off with Subscribe & Save (can cancel anytime) = $4.74 with free shipping on $35+ or with Prime.

Safe for diabetics, has zero calories and zero carbs. 1 tsp of sugar is equal to 5 drops of Sweet Drops.