Cuitisan

With Cuitisan, yes, and it is the whole point of the brand. Ordinary metal is a problem in a microwave because thin edges and points cause sparking, but Cuitisan's containers are engineered from a specially developed stainless steel that works with microwave energy instead of reflecting it. The body absorbs the microwaves and heats your food gently from the metal, rather than the waves hitting the food directly. Use the container on its own with the lid removed, and keep it from touching the microwave walls, just as you would with any container.

This is normal and it is the trade-off behind the technology. A standard microwave fires waves straight into the food and heats it fast by vibrating the moisture, which is also why microwaved food often ends up dry. Cuitisan heats differently: the stainless body warms up first and passes that heat to the food more gently, so it takes a little longer but holds the moisture in. Food comes out evenly warmed rather than hot at the edges and cold in the middle. Give it a bit more time than you are used to and stir partway through.

All of them. The same container handles a temperature range from minus 40°C in the freezer up to 400°C in the oven, so one piece stores, freezes, bakes and reheats. The only rule is to remove the silicone lid before using it in the oven or microwave; the lid can stay on for the fridge and freezer. That range is what lets you take a meal from the freezer, into the oven, and straight to the table in the one container.

Yes. The container that holds your food is solid 18/8 stainless steel, so there is no plastic in contact with your food and nothing to leach or shed microplastics, even when heated. The only plastic component is the silicone seal in the lid, which does not touch the food the way a plastic container's walls do. For anyone moving away from plastic storage over concerns about microplastics and chemicals, this is the practical reason Cuitisan exists.

No, and this is where it quietly outlasts plastic. The stainless steel is high in chrome, which is what stops it rusting through years of daily use, and unlike plastic it does not stain from tomato or turmeric, warp in the dishwasher, or hold the smell of last night's curry. There is also copper worked into the alloy, which has natural antibacterial properties. It washes clean every time and looks the same in five years as it did on day one.

It is fully dishwasher safe, lid and all. For the best result, take the silicone seal out of the lid so both sides dry properly, then put everything in as normal. By hand, warm soapy water and a non-abrasive sponge is all it needs, since nothing stains or sticks the way it does to plastic. As with any new kitchenware, give it a wash before the first use.