Following traditional invention processes, I dreamed about the bottle and realised that it could be made simpler...
The same inverted base but just one bottle involved. No waste!
The Marsh Tits have no preference for either and they are the most frequent visitors.
Meanwhile, on the lawn, the cold has encouraged Blackbirds, Songthrush and Starlings to return. Wrens and Yellowhammers ignore my activity and eachother. There is inevitably, evidence of a recently sighted Sparrowhawk taking understandable advantage. I shall spare you that one.
..and the Woodpecker has become more curious....
The other major predator just can't be bothered.
This one is really worth enlarging!