As long as you keep them in a cool (not necessarily cold--just more environmentally controlled than an average car or sunny window sill), dry place, you shouldn\'t have a problem keeping them that long. The biggest thing I\'d tell you to look out for is using them! Just keep in mind what you\'ll need by the time your trip comes along, and be sure to keep enough of them around for it.
It\'s DEFINITELY a good idea to get them in advance, though this far is not necessary. You\'ll want to play around with them and experiment to understand what works best with your personal chemistry in which circumstances for what desired results (social standing, attention from the opposite sex, etc).
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