I don't know about the requirements of crested geckos specifically, but I don't see why an appropriately sized plastic bin wouldn't work as long as lighting is adequate and there are proper hides etc.
This is an old post but I assume he or she's finding her food. She's still tiny but I've had her since August 2020 but I'm guessing she is just a slow grower.
You need to heat up the container with a basking light or such. This might melt the plastic. You should ask the people you buy it from if it is good with the heat from the light. Also, it might be a little small. Can you post a pic of your gecko in comparison to the container? Thanks.