Gr8 Garden Set Of 2 Large Blue Rustic Wood Style Wooden Effect Plastic Half Barrel Cask Planter 38cm Patio Flower Plant Pot Tub. Rustic-style blue plastic half-barrel cask planters are a great way to add a touch of vintage charm to your garden or outdoor space. These planters typically have a barrel-shaped design, made from lightweight yet durable plastic, and designed to mimic the look of traditional wooden barrels but without the weight and maintenance. The blue colour can add a vibrant, coastal, or farmhouse feel to the surroundings, blending well with a variety of outdoor decor styles.