If you eat the amount of a large date (this measurement includes the pit), you are obligated in a chatas.

If you drink the amount of your full cheeks, you are obligated in a chatas.

All different kinds of foods combine toward the amount that makes you

obligated for foods and all different kinds of drinks combine toward the amount that makes you obligated for drinks. However, foods and drinks do not combine for this obligation.

Yuma 8:3

If you ate and drank in the same time of forgetfulness, you are only obligated one korban.

If you ate and did a melacha in the same time of forgetfulness, you are obligated two korbanos.

If you ate or drank things that are not considered edible or drinkable, you are not obligated in a korban.