forbidden snack
An object which appears to be highly edible that is not, in fact, edible and is therefore considered to be "forbidden" despite its delectable yet deceptive appearance.
Laundry detergent pods, jelly pencil grips, dice, shiny marbles, Orbeez, slime, and squishies are all examples of forbidden snacks.
"Man, that new galaxy bath bomb I bought from Lush is such a forbidden snack!"
"Man, that new galaxy bath bomb I bought from Lush is such a forbidden snack!"