Walmart offers the Sterilite 18-Gallon Storage Box 8-Pack
in Gray, model no. 18158208, for $36
. Opt for Site-to-Store pickup
to avoid the $4.97 shipping fee. That's easily the lowest price we could find, as most merchants charge at least $10 for a single box, although we saw it for a buck less back in September. Each box measures 24" x 18" x 16" and features a snap-on lid.