"What on earth are you smoking?"
Reality is what I indulge in.
Doughnuts can be ordered the previous night by any prisoners for the next morning (as you would know if you'd spent any time in Klong Prem), as can other food items to supplement, or have in place of, what is offered free, three times a day, for example.
What prison shop? Every prison has a shop for the inmates. Bread, marg, jam, canned fish, 3-in-1 coffee sachets (hot water provided by the prison in the mornings), pot noodle and pot rice tubs and many other food items plus small selection of clothing such as shorts are available. All prisoners have a prison account opened for them into which visitors can deposit cash up to B9,000 and a card is issued a card for them to use for purchases. Items that are bought by the prisoners have the cost deducted from the balance of those accounts.
There is also a convenience store-type shop on the visitors side where many items can be bought by visitors and delivered to inmates. Ice cream was frequently sent in from the visitors shop for prisoners.