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Walmart [walmart.com] has 4-Pack Igloo MaxCold Small Ice Freeze Blocks (Various Colors) for $3.93. Shipping is free w/ Walmart+ (free trial available [walmart.com]) or on orders $35+.

Walmart [walmart.com] has 4-Pack Igloo MaxCold Small Ice Freeze Blocks (Blue) for $3.92. Shipping is free w/ Walmart+ (free trial available [walmart.com]) or on orders $35+.