As the hives available here have a small bee entrance opening, I tried a few open feeders, but see bees getting drowned. I tried something different, a plastic sheet (ziploc cover) with holes floating on sugar syrup in a pot. The bees can sit on top of the sheet and drink, but needs to be perfected as there is still gaps when the sheet goes down. I am unable to attach pictures here...the icon doesn't seem to work.