This steamer insert from IKEA is not something I use but something my mom always uses and RAVES about every single time I go home.
The steamer insert is stainless steel, light and can be compacted into pots and pans of any size:
The food that needs to be steamed goes into the steamer insert. Then, the steamer insert is put into a pot. Then, when the food is ready, the steamer insert can be taken out with this little tool to prevent burning hands:
This insert does what it needs to do, is practical and is cheap (less than $10 CAD). It’s not particularly aesthetically attractive but it does the job. My mom has zero complaints about this product and after she explained its design to me, I can see why she loves it so much.