The Colander Family

What it is

A colander is a bowl-shaped, perforated vessel for draining liquid from solids — pasta, washed produce, beans, fruit, blanched vegetables. It comes footed (to stand in a sink) or handled, and in stainless steel, aluminum, enameled steel, ceramic, and plastic. The defining variables are hole size and pattern, total open area (which sets flow rate), and material (which sets thermal behavior and durability). The name descends from Latin colare, "to strain," via colum, a strainer.

The science & materials

Drainage here is gravity-driven, and three properties govern the outcome. Hole size must match the food: large holes drain fast but let small grains (quinoa, orzo, rice) escape; small holes retain little foods but clog and drain slowly. Total open area determines how quickly a pot of boiling water clears. And material thermal mass matters more than people expect: a heavy cold metal colander pulls heat out of just-drained pasta quickly, while plastic insulates; some cooks deliberately warm a metal colander first so the pasta doesn't shock-cool.

The most consequential science is invisible: the thin film of starchy water clinging to drained pasta. As pasta cooks, surface starch leaches into the water and a portion stays on the noodle. That film is not dirt to be washed off — it is functional. The dissolved starch is the emulsifier that binds fat and water into a glossy, clinging sauce. Draining (rather than rinsing) preserves it; rinsing strips it. This single fact underlies the entire Italian doctrine below.

How it's used

Set the footed colander in the sink, pour the pot in one decisive motion (steam burns are the main hazard), and shake to release trapped water. For pasta, the refined move is to reserve a cup of starchy cooking water before draining, drain the pasta a touch underdone and still dripping, and finish it in the sauce pan with a splash of that water — mantecatura, the emulsifying toss that marries pasta and sauce. For leafy greens, lift and toss rather than letting them sit. Crucially, do not over-drain pasta: bone-dry pasta won't take a sauce.

Regional & cultural traditions

Italian pasta culture has codified the colander's use into near-doctrine: salt the water "like the sea," never rinse, reserve the starchy water, drain slightly early, and mantecare in the pan so the sauce emulsifies onto the pasta. The colander (scolapasta) is iconic, yet purists increasingly drain long pasta with the pot lid or lift it with tongs to keep even more starch. The East Asian tradition is the deliberate opposite: cold soba, somen, ramen-for-cold-dishes, and many noodle preparations are rinsed under cold water after boiling to strip surface starch, stop the cooking, and firm the texture — because in those dishes a clean, slippery, non-gummy strand is the goal and the sauce is a separate dipping broth, not an emulsion clinging to the noodle. The starch that Italian cooks guard, Japanese cooks wash away — same tool, opposite philosophy, each correct for its cuisine. (See the Zaru, next.) Indian cooking uses the drain-and-discard method for parboiled rice in some regional styles; the colander there is a rice tool as much as a vegetable one.

Cultural & historical context

Perforated draining vessels are ancient. The Romans used the colum, including specialized bronze wine strainers (colum vinarium) to filter sediment and herbs from spiced wine; Etruscan and Roman metalwork includes elegant perforated strainers. The humble modern colander is a direct descendant, and its name carries that Latin lineage intact.

Reference notes

Family members and neighbors: the spider skimmer, fine sieve, salad spinner, and the zaru. Central to Italian pasta technique — cross-link to mantecatura, pasta water, and al dente cooking. Contrast sharply with the rinsing philosophy of Japanese cold-noodle service. Cuisine: Italian (and a cautionary cross-reference to Japanese noodle practice).

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When to use

Use a colander to separate cooked solids from cooking liquid fast. Choose a fine sieve or chinois instead when you need to catch fine particulate; a salad spinner when you need greens dry, not just drained; a spider skimmer or tongs when you want to lift food out of the water while keeping the maximum starch and the water itself. For long pasta in particular, many cooks now skip the colander entirely and transfer strands directly to the sauce with tongs precisely to retain that starchy film.

What goes wrong

The cardinal error in Italian cooking is rinsing pasta: it washes away the starch, cools the noodle, and leaves a slick surface that sheds sauce. (Rinsing is correct only when you want to stop the cooking and remove starch — for cold pasta salad, or for certain Asian noodles, see below.) Other failures: wrong hole size letting small foods fall through; plastic colanders warping or melting under a torrent of boiling water; over-draining so the pasta is too dry to sauce; and the perennial steam burn from pouring carelessly.