This simple, somewhat risque but great little pocket effect is once again available from Ickle Pickle products.
Effect: A spectator is asked to select one of three items: a pea, a navy bean or a piece of popcorn. All three are put inside a small "Magic Peas" can and plugged with the cork. The spectator is asked to hold out his hand and concentrate on the item he selected. You then open up the container and state, "You were thinking of...the pea!" and pour "water" out into his hand!
Very easy to perform, always gets a laugh.