What is it? A bag of water

In the photo below, notice the two bags of water suspended with the blue string. What are they? Or perhaps, What are they doing? As always, put your guesses in the comments.

090207 Flower festival

2 comments:

Michelle K said...

Are they to keep flying insects away from the food by swinging back and forth across the top of the food?

James Garriss said...

Cha-ching. Periodically the woman gave the bags a push, and as they swung back and forth over the food, they shooed the flies away. There were still too many flies around for my taste.