Replaced a 2 cup glass with one of the 4 cup glass purchases. Other parts are interchangeable. Hungry/thirsty little critters made short work of the two cup glass. Each 4 cup feeder lasts a day now. The other glass was a spare for filling with a fresh batch. This way, when it is time to refresh either feeder, I just use the filled spare glass and just wash the other two parts. That way, the refilled feeder is out sooner. I was getting some backlash from my feathered friends about taking too long to refresh their free handout. I guess my thank you from them is their ability to empty 8 cups in a day. Such a hoot to see 14+ hummers at a time most of the day.
1 Replacement, 1 Spare Glass Bottle