Wooster 1 gal. Paint Can Grid 00R0080000 - The Home Depot
Paint roller grid
Silverline Paint Roller Tray Scuttle Loading Grid 5pk 668610| Sealants and Tools Direct
See Jane Drill – Use a Paint Grid to Paint a Room Faster
9" Painting grid
Home-X - Metal Paint Roller Grid for 5 Gallon Paint Cans, Bucket Roller Grid is Perfect for Straining Excess Paint so You Get The Perfect Coverage with Every Brush : Amazon.sg: DIY