Dish storage bags are commonly made from silicone and various plastics, most often polyethylene (including low‑density polyethylene, LDPE) and other general plastic formulations.
Capacities range from small snack sizes up to gallon/liter scales. Examples in the set include 28 fl oz, 1 quart, 64 oz, 128 oz (1 gallon), and about 7.6 liters.
Closures include double‑seal or double‑lock and press‑bar systems, push‑stud closures, slide/slider zips, and pinch‑style leak‑free seals. Several listings highlight slide or double‑lock seals for an airtight closure.
Common labels include BPA‑free; some products also advertise phthalate‑free or specifically note being free of BPS, lead, or latex.
Many bags feature a sturdy, expandable or pleated bottom so they can stand upright while you fill them, reducing spills and speeding up meal prep.
Common features include puncture‑resistant materials, extra‑strong seal tracks or click‑to‑close seals, and designs described in product details as watertight or leak‑free.