With there only being 47 days until I arrive in the beautiful Içmeler I am looking at suncreams. I usually use Piz Buin Allergy but for some reason never come back home with much of a tan. Plus its a pain putting it on repeatedly through the day (I want to be relaxing and drinking Efes instead of smearing cream all over my body lol). So this year I have decided to give P20 a whirl. It seems to be OK for people with Prickly Heat and you only have to apply it once a day.
So the question is mainly for P20 users. How much will I need for a week in Içmeler? I don't want to end up not having enough so I'm not sure whether I should be getting 100ml or 200ml (hopefully no more than that because it aint all that cheap lol).
So anybody with any advice please.
Thank you kindly

Karl