Far superior in both design and function to the old style: 1. The large feeder holds over 4 lbs. of sugar syrup, the small feeder holds 2-1/5 lbs of sugar syrup. 2. The feeding source is inside the hive. 3. Designed for 3/8" bottom board entrance, but can be used on a 3/4" entrance with a wooden insert (supplied). 4. Constructed of easy to clean, high impact plastic.