We do sometimes if it is a lot of food.
This is what most people say and do ... but what they dont realize is that , the food that gets thrown in the bin , they will be held accountable for it on the day of judgement....
and as per one hadees , we should even lick the fingers for reason that we dont know which food particle held the rizk blessings for us ....
since we dont eat anymore using our hands , the above hadees does tell us the importance of blessing hidden in every little particle of food ...
so no matter how little it is , take it with you and remember that in a few more decades your next generations will be fighting wars for every little bit of food...