pour back

pour back (in(to))

To return some liquid to its previous receptacle. A noun or pronoun can be used between "pour" and "back." You've already started drinking that soda—you can't just pour it back now! If you don't want the water, just pour it back in the sink. I poured back the cooking oil into the bottle to use it again another day.
See also: back, pour
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

pour something back (in)

 and pour something back into something
to replace a liquid into something. Larry poured the extra glass of orange juice back into the pitcher. Lily took too much and poured some back. Pour back the extra juice into the pitcher.
See also: back, pour
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
See also:
References in classic literature ?
They pour back across the stream--half of them; the rest are dead.
5 Pour back into the pot and add the chickpeas and coconut milk.
3 Remove the vanilla and pour back into a clean heavybottomed saucepan.
Strain the broth through a sieve lined with a double layer of muslin or cheesecloth into a bowl, then pour back into the saucepan.
Pour back into the saucepan and set over a low heat.
Pour back into the pan, season and heat through to serve.
Then pour back into the pan with the remaining half of the milk and place back onto the heat, whisking constantly until the mixture comes to the boil and becomes very thick.
of wild hibiscus syrup shaken ("very gently, Robinson said," "just pour back and forth") and strained into a flute, then topped with prosecco and garnished with an edible wild hibiscus flower.
"The money belongs to Nation, collected through taxes and will pour back to them with prudence in open and transparent way'.
Whizz the soup with a blender or in a food processor until it is a rough pure, pour back into the pan and add the chickpeas.
"If we gave up Afghanistan tomorrow, I absolutely guarantee that if you are an AQ [al-Qaeda] member or Taleban, they will pour back into southern Afghanistan and they will have the freedom to plan and train and conduct operations which now they don't have," he said.
(3) Pour the warm milk into the egg, stir and pour back into pan.
Set to a timet, the tea steeped for more than a minute, and then was ready to pour back into the glass pot to serve.