Could I squat on an American toilet without the chance of it cracking?

I'm not even ninety pounds. I'd love to have a squat toilet, but it's not my house. And besides that, my parents are a bit too old to make that change now. When I buy a house later in life, how can I get the squatting experience instead? I heard that you can get this metal contraption installed over the toilet, and it can support the weight of a squatting person.