I personally use Technoset bee top feeders from Greece. The benefit of these feeders is they have a plug in the middle that can be removed if you want to feed dry sugar/pollen cakes/supplements etc. You can also install a plug into the lid of the hive so you can fill the feeder directly without opening the hive (I haven’t gone to this step yet)
Here are some photos of my feeders (apologies for quality, I took the photos quickly when I was wintering my hives today)
