I tried doing that with a 2-liter to catch mosquitoes. I mixed some yeast in with the sugar because mosquitoes are supposed to be drawn to the carbon dioxide created. I didn't get any mosquitoes but got TONS of flies.
Since I was using a 2 liter I just took the lid off, didn't drill anything.
Since I was using a 2 liter I just took the lid off, didn't drill anything.
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