This 1 gallon hive top feeder is a great option to feed your Langstroth hives. Due to its low height, it fits well into a shallow, medium or deep box on top of the inner cover. Bees crawl up through the bottom into the feed area, and due to the rough plastic on the inside, are better-able to crawl their way out. This gives it more versatility than most other top feeders such as a pail feeder.
This feeder won't work with our horizontal top bar hives or Warre hives due to its size -- it needs a 10-frame (8-frame aren't wide enough) Langstroth shallow or taller (medium or deep work, too). 15.5"x13"x3" and holds 1 gallon of liquid.