Ceracell Beekeeping Supplies in New Zealand took a good long look into these problems and redesigned the feeder. The new design feature 100% virgin plastic, access to syrup in all 4 corners and the middle, plus it hold 2.5 gallons of syrup. In the winter months, it can be used to feed dry sugar, like the mountain camp method. Just remove the middle and corner covers so the bees can reach the sugar.
I am proud to say that after working with Ceracell and testing out the feeder it is now available in the USA. The current US distributor is working hard to keep the price low but bare in mind that shipping from New Zealand is very expensive.
Purchase Feeder Here: http://amzn.to/2x6deR6
My Top Feeder video