More than one vent peg drips round both ends of the ice bag (7)

I believe the answer is:

spigots

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'ends of the ice bag' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Maybe there's a link between them I don't understand?

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for spigots that I've seen before include "Regulators for controlling the flow of liquid" , "given bungs" .)

I've seen this clue in The Irish Independent.

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