Thumb Score: 0

Amazon has 3-Ft Mayne Fairfield Polyethylene Window Box Planter (Black) for $ 75.21. Shipping is free.

Also available at Walmart. Shipping is free.
https://www.walmart.com/ip/15204489

Mayne molded plastic planters are made from 100% high-grade polyethylene, with a double wall design creating a water reservoir.
Outside Dimensions: 36"L x 11"W x 10.8"H. Inside Dimensions: 32"L x 7.5"W x 8"D
Water reservoir capacity is approximately 3 gallons (11 Liters), Ensure that nothing is blocking the drainage hole.