Of winglets, who gives a hoot?

Hey, Nose on Screen, waiting to chew
check this nifty ‘winglet’ thing!
They are rarely more than just two
one at the tip of each wing.

Whether of much use those winglets
or the plane a sleek cygnet
whether most pilots wear singlets
or air travel mere figment:

Still heart & soul of air travel
seems the ‘wheeled larder’? Take heart!
No risk in sky to unravel
for here rolls the service cart:

Heavenward passengers scoot!
Of winglets, who gives a hoot?

+)
-winglets = small angled wing tip extensions which provide extra lift, reduce drag & fuel consumption (somewhat)