Walmart: 14-Piece Mainstays Round Rainbow Food Storage Set $4.97 This post may contain affiliate links. Please see disclosure policy. September 16, 2017 by Daphne Murray Head on over to Walmart and get this 14-Piece Mainstays Round Rainbow Food Storage Set for just $4.97. Choose free in-store pick up, if available. Or get FREE 2-day shipping on any eligible $35+ order or pay $5.99 for shipping for orders under $35. Find more Walmart deals when you click here.