My elderly mother has just been given a commode which has been placed by her bed. Unfortunately last night, when she needed to use it, she probably tried to use it to pull herself out of bed and the thing toppled over taking her with it.

I'm new to this situation and I wondered why anyone would design something like this. Surely there must be ones which are more stable than this thing. Can anyone tell me where I might find one?

Thanks in advance.