Staples offers the ModernHome Motion-Activated Stainless Steel Trashcan Set, model no. SMD-233, for $39.99. Plus, Staples Rewards members qualify for free shipping. (Not a member? Click here to sign up for free.) That's the lowest total price we could find by $36 and the best deal we've seen. The set includes one 11-gallon can and one 3-gallon can, each featuring a fingerprint-resistant finish and liner seal. The large can requires four D batteries, and the small can requires four C batteries (none included). Deal ends December 12.