Portable Storage Container Rental Special Discount Extra Large Portable Storage 8′ x 8′ x 20′ 25% off your first storage container delivery Receive the discount with a 3 month minimum rental of a 20′ container Our containers hold 33% more than our competitor’s Why rent two containers if one gets the job done? No storage fee at your site OR our secure storage facility Don’t delay! Call now to reserve your container. This is our best discount promotion and is not valid with other discount offers Call Now: (612) 920-3540 or click here for an immediate quote online. Big Blue Boxes is a friendly and reliable Twin Cities company.