Styrofoam containers are lightweight and insulating containers made of a type of plastic foam called styrofoam. They are commonly used for take-out food, as they keep the food warm and prevent leakage. Full definition
Went to dinner, ordered too much food and brought home leftovers in styrofoam containers. (crunchydomesticgoddess.com)
It comes in a heavy duty styrofoam container filled with ice packs to ensure that the cultures stay active. (bjjcaveman.com)
The whole setup is then placed, skin - side down, over the opening of a small Styrofoam container holding dozens of female mosquitoes (males do not bite). (scientificamerican.com)