Chewing plastic allows one to focus on challenging things, much like horses have a bit.

Also delays taking food instead, which is usually used as a kind of neurological or nervous reaction to the natural state of accomplishing challenging tasks.

I recommend soft wrapping (pasta wrap, crisp packets) and plastic juice bottles (sideways-on start to chew and flatten).

Although the idea or even using plastic doesn't make sense usually, as a material this has squashy properties which can work for you before throwing away.

This is a kind of practical solution in the time of scarcity and economy of spending time economically while being productive in other ways.