Sorry, what do large purses have to do with this?
3 1/2 hours since you posted and no one has responded. I’ll try. I assume Joshus C meant the practice of plastic bags and a large purse into which you shovel the food for consumption at home.
While a grad student working on my PhD in biophysics & physiology, I had occasion to get my basal metabolic rate measured to confirm what an undergrad TA experience had indicated. My BMR was 3+ SD high. I’d been ca 145-147 lbs and 6’ through my teens and the military.
Life was pretty good, with the GI Bill and an ONR research assistantship but about 1x per 2 weeks I’d bicycle 12 miles to a local chain buffet and eat until surfeit.
Once, ca 50 years ago, a new manager came on duty. He eventually sat down at a neighboring table and watched to see if I was stealing food.
He knew that I knew that, etc. I made two more passes than I ordinarily would have just to show him he needed to reset his metrics.
He should have asked the staff. They knew me by name and let me store my bike in the basement. A bigger problem for the managers was having to run the staff back to their jobs - they sometimes gathered at nearby tables to listen to we grad and med students talk about the week’s events.