Blue Akro Agate Glass Planter at RetroChalet
Courtesy: RetroChalet Etsy Shop
Akro Agate ( Azurite blue?) made marbles, and the seller thinks they may have made this too. Known for the glass swirls, this is done in pretty hues of blue. Often found on vases, this is a rectangular planter. Even as is, selling for $32 to possibly hold your marbles, at RetroChalet.