Here is another creative LEGO storage idea.
Amazon has the Neat-Oh! LEGO City ZipBin Toy Box & Playmat
Description: Keep your child’s room totally neat with LEGO City ZipBin Medium Toy Box Playmat. When unzipped, it becomes a city-themed playscape perfect for testing out new LEGO creations! When play is done, capture all the bricks inside. Sturdy, strong, stackable and portable.
Pricing was current when the post was published, however Amazon prices change often, so please check before you buy.