From stainless steel to bamboo, there are almost as many kinds of steamers as there are things to cook in them. A pasta pot fitted with a deep, perforated basket can steam almost anything. There's room for only about an inch of water, though, so these pots are best for foods that cook in less than 30 minutes. Shallow steamer baskets hold less, but they allow more room for water, so you can use them for foods that cook more slowly; you can also boil some ingredients and steam others at the same time. Foldable steamer baskets are inexpensive and can fit any pot; bamboo steamers that fit over woks don't cost much, but boiling water in a wok can ruin its seasoning. Stacked oval metal steamers are more expensive, but they're the most versatilethey can hold everything from fish to Cornish hens.
Steaming in Foil