How do I stay awake at the beach all day?

So I'm hanging out with my best friend to day (of ten years!) and I have not slept yet I'm insomniac but I really want to hang out with her and I don't want sleep on the beach because I might have my contacts in. I also hate coffee so I'm not drinking that and I refuse to drink energy din kss what do I do? She's picking me up at 9 this morning. WDID?