Central access, as well as corner access, to the top feeder is a good option for late winter/early spring feeding as the bees will be more reluctant to go to the edges of the hive as this is where it can be cooler. By having central and corner access, this gives the bees more routes to the sugar syrup and have the option to stay in the middle where it is warmer. This is why our Blue top feeders have both corner and central access. The chimney cap slots into the central port and has small slits at the very bottom to let the bees drink the syrup but not able to get into the feeder itself, thus preventing drowning. Make sure it slotted on properly to avoid it being knocked off and creating a gap for the bees to get into the syrup.
In the late winter/early spring you may want to feed a heavy syrup (2 kg of white sugar to 1 Litre of water, heated until fully dissolved) in your top feeder. The top feeder is ideal for this since you don't need to open up the hive to get at the feeder. Just lift off the hive mat and fill the feeder. This shouldn't stimulate the queen to lay and with it being in a top feeder she shouldn't sense too much the sugar coming in. When feeding in this way, use corner caps and a chimney cap to restrict the bees and prevent them from getting out in the bulk of the liquid. This will minimise drowning.
Top feeder sold separately. Check it out in this section of our website.