Can't answer with so little information:
- Are you vacationing in a place with lots of jelly fish? (Personally, I've lived more than 50 years without being stung.)
- How many people will be sharing that one bottle?
- And for how many beach days? If you expect some pool-only days, I'd be tempted to buy cheaper sunscreen for those days.
- Jelly fish aside, is it good sun screen?