Here is my styrofoam container: I made the hole with a piece of hot wire. With the Anova sitting on the lid, the bottom of the unit is about 5 mm from the bottom of the container, so there is no need to heat more water than necessary. Capacity is 13.5 litres (about 3.5 US gallons). I’ll add a small hole in the opposite corner so steam can escape somewhere other than around the Anova. I’ve tested this with a gallon of boiling water. No issues with the styrofoam deforming or the like and
Anova Culinary ANVS01-US00 Anova Precision Vacuum Sealer, Includes 10 Precut Bags, For Sous Vide and Food Storage : Grocery & Gourmet Food
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Concession Essentials Pack of 30CT Choice Large 9 x 9 x 3.5 Inch Foam 1-Compartment Containers, White, Hinged, with Optional Venting, Polystyrene, 9L x 9W x 3.5H : Health & Household
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RECTANGULAR FOAM CONTAINERS – L&P Packaging Ltd
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SN225, White 6 x 6 Snap It Lock Hinged Square Container, 5.81 x 5.69 x 3.13
Styrofoam recycling could help restaurants save mush costs every year
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Green To-Go: Evaluating the Effectiveness of an Intervention Package on Restaurateurs' use of Styrofoam Take-Out Containers - UNT Digital Library