5. PVC Tube Feeder with Slippery Coating

Using PVC pipes is a simple and inexpensive DIY idea. Coat the exterior with a slick, non-toxic spray to make it impossible for squirrels to grip. Combine this with transparent tubes, colorful end caps, and small perches for birds.

Why it works: The smooth surface foils squirrel climbing, while the transparent tube allows birds—and you—to enjoy a clear view of the seeds.