I recently bought a Candibox feeder. It's a rectangular plastic tub that sits in the deep. You put two frames of foundation in it, fill with syrup. It holds 2 gallons. my bees went through 5 quarts quarts of 1:1 syrup in two days. I just filled again with 2 gallons. It seems OK, no drowned bees, but I really don't like having to crack the hive open every couple of days to fill this thing. I was wondering if I could drill a 3/4" hole above the thing, use a vunyl tube and funnel left in place to fill it? Has anyone else tried these things?