Mixed Nuts (5e Trap)
From D&D Wiki
Would you like some mixed nuts, perhaps? This trap is mechanical, though slightly magical in its effect.
This trap is a can filled with little springy foam snakes. It can be purchased at a shop at a value of 5 CP, and has a weight of 1/8 pound. When used, the cap of the can is removed and any creature within 5 feet of the user must make a DC 10 Wisdom check or be stunned or confused (user's choice) for the next 2 rounds. If the user has stated that they have mixed nuts, and if would they like some, then if they accept or fail a DC 10 Intelligence check to try to decipher whether or not it is a trap, the creature automatically suffers from confusion or being stunned (again, user's choice).