I am a big fan of repurposing projects, so this DIY is right up my alley! You can go to any antique shop or thrift store and find a old teacup and saucer set for sale. You will definitely get a better price at a thrift store, so check there first.
If you visit Intimate Weddings, you will find a full photo tutorial on how to assemble these cute bird feeders.
Since this is a low-level bird feeder, you will probably need to drill some small holes in the cup and saucer for drainage. There is a tutorial on how to drill a hole in glass without it breaking at Turnstyle Vogue.
I would suggest Millet or Milo when filling up your low-level bird feeder. Here is a great website that explains the different types of birds and seeds.