Costumes and Props

Girl-
Shoes that can be a focus, as we see her running later in the forest, we can have calm shots of her shoes at the party/bar.
She'll be wearing fake nails that show she cares about her appearance, they will also make her hands look better-as they will be used in close ups of her drinking the Daiquiri.
Straightened hair is typical of teenage girls.
We are undecided as to what the girl will be wearing, although we will probably have her in something white, to portray innocence, also to match the cocktail. In addition, white will get very muddy in the forest and this should look effective.

Man/men-
wearing black-so that they don't stand out, contrasting with the white.
sinsiter, dark colour.

Party people-
in attire that they would normally wear to a party. Bright colours.

Additional props
The Drink -to make the drink not stand out too much and to look out of place, we will have people in other shots drinking from cocktail glasses but not the same cocktail.
Plastic cups -for other drinks.
a pill (soluble paracetamol)
mobile phone -for a shot of vibrating mobile phone on the floor.

We will update this post if we think of any other props to add.