Listings show strainers made from plastics (including polypropylene and BPA‑free plastic), stainless steel, and recycled polypropylene (rPP).
Capacities and sizes vary widely—from small handheld strainers (~9.75 ounces) up to multi-quart colanders. Example listings include 24 oz, 41.45 oz, 3.08 liters (about 3–3.7 quarts) and up to 5 quarts, covering both single-cup filters and larger bowl-style colanders.
A common nested mesh strainer set includes three sizes: 3 1/8", 5 1/2", and 7", which covers small to medium rinsing tasks.
Common stabilizing features include top frames or long handles that rest on pots, secure loops or wide rims that stabilize strainers on bowls, and feet or a raised base for stable standing.
Fine mesh screens are highlighted for rinsing small items, and listings note stainless-steel construction, sturdy rims, and solid build to prevent small pieces from passing through.
Over-the-sink strainers are designed with narrow, expandable frames so they can fit a range of sink widths. Some models include a removable strainer insert and a soaking tray, making it easier to rinse, separate, and drain produce in smaller sinks.