Visit Walgreens this week for a double-dipping deal on CoverGirl mascara! Buy two Super Sizer by LashBlast Mascaras. They are on sale for $6.99 this week, and they are buy one get one 50% off. Spend $10.00 before manufacturer coupons to score a $3.00 Register Reward at checkout. Use two $3.00 LashBlast coupons for a final price of $0.74 per mascara.