Silicone molds may be used for steaming, but only use food-grade silicone. Silicone bakeware or molds that are oven-safe should also work well for steaming.
Silicone cooking utensils are non-corrosive and long-lasting. The silicone that has been approved for use in food is perfectly safe. It does not dissolve in food or liquids and does not produce any unpleasant odours.
Stainless steel, unlike certain metals, does not rust when exposed to certain acids found in food. In addition, it does not have a negative reaction to extremes in temperature. As a result, it will probably last longer than other cooking utensils.