i am using these Igluu Meal Prep Round Plastic Containers - Reusable BPA Free Food Containers with Airtight Lids - Microwavable, Freezer and Dishwasher Safe - Ideal Stackable Salad Bowls - [10 Pack, 28oz].

they are great for me. they stack in the frig and freeze well. they are sturdy for the dishwasher. you can see rise thru the clear top. stack neatly to take up small storage space.

I saw a recommendation on here about round meal prep/takeout containers. I've been using them with a lot of success. I put one dough ball in each and then I can portion as many as I want into the fridge vs freezer. They're really cheap which is obviously great. They are also stackable and much easier to fit into my fridge/freezer than a proofing tray. These are the ones I bought: https://www.amazon.com/gp/product/B07VF6LYJN/