When the corner of your laundry basket frame cracks and everything falls apart, then you just print a new corner.
I printed this with PETG 100% laying flat as an L on the print bed with no supports. Then thread the hole M5 if you are using it for the rolling wheels and skip the threading if there are no wheels. Hammer them in and they will stay there.

Designed using onshape. Use this link to copy and redesign if you like:
https://cad.onshape.com/documents/0fff80ac9e29d5051923866a/w/97d3273b7c3978c475e12aa4/e/8beb5de47e251b044d3ac28c?renderMode=0&uiState=65e376431a2d090e2f4d4656