Looking on the internet deeply has found these results:

they are put into bags is the most popular phrase on the web.

they are put up into bags 10 results on the web	they are put into bags 168 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	As the oysters grow they are put into bags with a larger mesh until they are ready to be sold. On average it takes three years for an oyster to reach marketable ... ... of the bag size distribution is immaterial for the present purposes. 5 Since they are put into bags, ~ui and ~vi could just as well be bags instead of sequences. As the oysters grow they are put into bags with a larger mesh until they are ready to be sold. On average it takes three years for an oyster to reach marketable ... Then they are put into bags and shipped to countries where they are roasted. At their destination the beans are combined to make different blends of coffee.

they are put up into bags

10 results on the web

they are put into bags

168 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

As the oysters grow they are put into bags with a larger mesh until they are ready to be sold. On average it takes three years for an oyster to reach marketable ...
... of the bag size distribution is immaterial for the present purposes. 5 Since they are put into bags, ~ui and ~vi could just as well be bags instead of sequences.
As the oysters grow they are put into bags with a larger mesh until they are ready to be sold. On average it takes three years for an oyster to reach marketable ...
Then they are put into bags and shipped to countries where they are roasted. At their destination the beans are combined to make different blends of coffee.