3 Don't force readers to go to another site to understand your answer. Links can go dead, or content can change. It's best to excerpt the relevant parts of your link and add them to your answer.
source | link

We also sometimes request a "doggy bag", which is the same thing as take-out.

Example: "Can I get a doggy bag to go?"

EDIT: Here's an example from Here's more proof.Can I Have This to Go?

During a recent meal at Craftsteak, I was impressed by the way the restaurant handled a request by one of my companions that unconsumed portions of food on the table be wrapped up so she could take them away.

After servers cleared the table, one of them returned with a claim check instead of a doggie bag.

We also sometimes request a "doggy bag", which is the same thing as take-out.

Example: "Can I get a doggy bag to go?"

EDIT: Here's more proof.

We also sometimes request a "doggy bag", which is the same thing as take-out.

Example: "Can I get a doggy bag to go?"

Here's an example from Can I Have This to Go?

During a recent meal at Craftsteak, I was impressed by the way the restaurant handled a request by one of my companions that unconsumed portions of food on the table be wrapped up so she could take them away.

After servers cleared the table, one of them returned with a claim check instead of a doggie bag.

2 I'm honestly surprised at how few people encounter this phrase, because I've used it all the time.
source | link

We also sometimes request a "doggy bag", which is the same thing as take-out.

Example: "Can I get a doggy bag to go?"

EDIT: Here's more proof.

We also sometimes request a "doggy bag", which is the same thing as take-out.

Example: "Can I get a doggy bag to go?"

We also sometimes request a "doggy bag", which is the same thing as take-out.

Example: "Can I get a doggy bag to go?"

EDIT: Here's more proof.

1
source | link

We also sometimes request a "doggy bag", which is the same thing as take-out.

Example: "Can I get a doggy bag to go?"