Target offers a $10 Target Gift Card for free with purchase of two select disposable diaper packs. Also, get a $10 Target Gift Card for free with purchase of two select formulas. (Select formulas offer a stronger gift card, although most won't stack with subscription orders.) Even better, all orders qualify for free shipping. Deal ends January 24. A couple best bets, with comparisons assuming you'll use the gift card:

• 2 Up & Up Size 2 Diapers 172-Count Giant Packs (344 total) w/ $10 Target GC for $57.98 (pictured, $0.14/diaper, $10 off)
• 2 Huggies Little Movers Size 3 Diapers 128-Count Giant Packs (256 total) w/ $10 Target GC for $68.98 ($0.23/diaper, low by $7)

Note: Be sure to cancel the subscription service after your order ships to avoid being billed for subsequent shipments.