Soda (PET) bottle bird feeder with a roof

thingiverse

A simple yet stylish soda bottle bird feeder, adapted for rainy environment, such as Norway or UK. The roof and extra heavy duty drainage are especially important there. Smaller food may fall through the drainage, but that is no issue for sunflower seeds, which is the only thing I fill this with. The raisers can be used to fine tune the feeder to the bird species: with 0 risers, it is good for the smallest tits only, with 1 raiser it is for sparrows, larger tits and robins, with 2 it is also suited for finches and such. The funnel makes it much easier to fill the bottle. To hang this, use any of the hooks you can easily fond, or just a scotch tape and a cord/shoe lace, which is what I do.