The basic functions of a plastic colander is to separate the liquids from the solids. Here are some situations when a colander will come in handy:
1)The kitchen colander can be used to hold the potatoes in place while you separate it from the boiling water.
2)You can also use it to sieve out the cooked spaghetti from the boiling water.
3)While rinsing lentils, you can use the plastic colander to keep the beans in the bowl, instead of letting it fall over the sink.
So with a good colander, it can provide you with a firm grip so that you can hold onto it tightly or maneuver it easily without slipping off your hands. And of course, the holes on the colander will be big enough for water to seep through quickly while keeping the solids safely in the bowl. And with a stand at the bottom of it, you can leave it standing in the basin, and not allow the ingredients to be in contact with any contamination.