Throw a bunch of things in a plastic bag, put in raw meat, go to work (or sleep), and when you come back, best friends.
A marinade is a liquid mixture that you can soak food in before it's cooked to make it way more delicious.
You can use a plastic bag...
...or a nonreactive dish (glass, ceramic, plastic, stainless steel, but not aluminum or copper because they will react to the acid).
Source: marthastewart.com