Two-part, very small capacity, plastic hummingbird feeder (holds about 2 1/2 ounces).
For years I wanted to put out nectar, but was afraid I would forget it in the sun an it would spoil. Then I found these small feeders at Lowe's. During the summer, with 2 - 3 hummingbirds they don't last much more than a day.
Although I tend to check them daily, I do not have any fear that they will spoil and make the birds sick--due to the small capacity.