Laundry detergent bottle?

I’m a college student and I’m going to be moving into an apartment that will require me to go to a laundromat every week.

I need to know if there are any smaller bottles (and where they are sold – online preferably) that I can maybe pour detergent into so that it will be easier to carry.

Thanks for the suggestions!
If you have any tips to make this process easier, feel free to share!

:)