Help needed: Creating part - Camelbak's water bottle

Hi,

This is my first time here, so I am not sure if I am asking in the right place.

I have this camelbak waterbottle at home, and I've trying to model the cap of the bottle. Unfortunately I couldn't. I am hoping someone here can give me some guidance.

What really struggle me is the how to create the shape of the handle, and making all the details on the surface.

Attached file is the same bottle I have. I don't have the dimensions for the part.

Thanks in advance.

SolidworksParts And Features