Sleight of Hand

EFFECT
An annoying person returns from the toilet to find that their bottle of soda has been turned upside down without any soda falling out.
The bottle is then handed to them when the soda spills all over the place
PREPARATION
You need
A packet of cigarettes
A full bottle of soda
A soda mat
Sharp scissors or a knife
A fast pair of [...]

With the pack well squared in the left hand face down, bring the right hand over it, thumb at the rear, fingers on the outer end. Make a motion of squaring the ends and at the same time press the fingers back a little making the ends of the deck slightly wedge shaped.

With the [...]

Hold as many cards as you are going to change, tip between your 2nd and 3rd finger not letting the audience see them. this can be done by distracting the audience with patter and gliding cards to the left. Put the cards in your right hand (the ones to be changed) in between the left [...]

This deck is a trick deck wherein the backs of the cards used have a thick, non-slick surface. The cards are placed back to back in certain pairs. There a few rules in determining these pairs:
1) Each pair adds up to 13 (9 and 4; 6 and 7; queen and ace; king and king; [...]