Some definitions of "flexible":

Oxford: "Capable of bending easily without breaking"
Merriam Webster: "capable of bending or being bent"
Cambridge: "flexible adjective (ABLE TO BEND) able to bend or be bent easily without breaking: "
Macmillan: "able to bend or move easily ... Able to be bent, stretched or pressed:flexible, yielding, pliable.."

What's wrong with this sentence? "He picked up the flexible granite rock and used it to wash his zucchini."

All of the definitions contain the word "bend"; this handle might bend if you held it in a bench vise and smacked it really hard with a ball-peen hammer, but with bare hands? No way.

That's what's wrong with this brush: the only part of it, despite the third bullet in the description ("Flexible, non-slip grip" -- GRIP), is the bristles., which wouldn't be very useful for vegetables if they _weren't_ flexible., Maybe for taking paint off a brick wall, but not typical organic matter.

OXO has been screwing around with its products, and not to their benefit. The revised version of their cheese grater is horrible, where the old one was nearly perfect. The handle on the old one fell off after many years, and we're now using it by turning the plastic stem where the handle used to be -- a bit painful, but not as bad as the terrible job the new one did before it was relegated to the drawer where useless things accumulate for the next yard sale.
Some definitions of "flexible":

Oxford: "Capable of bending easily without breaking"
Merriam Webster: "capable of bending or being bent"
Cambridge: "flexible adjective (ABLE TO BEND) able to bend or be bent easily without breaking: "
Macmillan: "able to bend or move easily... Able to be bent, stretched or pressed:flexible, yielding, pliable.. "

What's wrong with this sentence? "He picked up the flexible granite rock and used it to wash his zucchini. "

All of the definitions contain the word "bend"; this handle might bend if you held it in a bench vise and smacked it really hard with a ball-peen hammer, but with bare hands? No way. That's what's wrong with this brush: the only part of it, despite the third bullet in the description ("Flexible, non-slip grip" -- GRIP), is the bristles. , which wouldn't be very useful for vegetables if they _weren't_ flexible. , Maybe for taking paint off a brick wall, but not typical organic matter. OXO has been screwing around with its products, and not to their benefit. The revised version of their cheese grater is horrible, where the old one was nearly perfect. The handle on the old one fell off after many years, and we're now using it by turning the plastic stem where the handle used to be -- a bit painful, but not as bad as the terrible job the new one did before it was relegated to the drawer where useless things accumulate for the next yard sale.