The phrase signifies a specific type of decorative item depicting the dwarf planet Pluto, manufactured using blow molding techniques and sold at Walmart retail stores. Blow molding is a manufacturing process used to create hollow plastic objects. An example would be a holiday decoration shaped like Pluto, intended for outdoor display and found for purchase at Walmart.
The availability of such an item at a major retailer reflects several factors. Firstly, it indicates consumer interest in space-themed decorations. Secondly, it demonstrates the accessibility of mass-produced plastic goods through large retail chains. Historically, this type of product represents the evolution of manufacturing processes and the increasing affordability of decorative items.