Maybe Perspex / Poly (methyl methacrylate)?
If you are making a hamster cage, it's also worth thinking about ventilation - there is a school of thought that keeping small animals in tanks is bad (though some people do so without problem) wrt to air flow through the environment. I have caged upper levels on my hamsters tank to help with this (bonus: she loves it).
Thanks for the suggestion. The idea came about owning a hamster. The cage took ages too clean and was difficult due to complex geometries and the material being difficult to clean.
The problem that i have discovered with cages out now, are they begin to lose their transparency over a certain period of time, when being subjected to cleaning. They are also created from brittle polymers (well the one i had).
"there is a school of thought that keeping small animals in tanks is bad",
The minimal floor area for a hamster should be 1000cm^2. I have thought about floor space and have taken care of adequate floor spacing (around 2000cm^2 area) the ventilation within the cage will be researched, and will be implemented not a big worry at the moment.
As for keeping a hamster in cage or not, can be argued, but all I can say were else should hamsters be kept? (as pets)
Noting cages with bars are bad, as most hamsters even if provided with chew toys (they will eventually get bored) end up gnawing on them endlessly, which could lead to breaking their teeth, or could cause brain damage.
Thanks again for all the help