If the bottles have never been open you're fine. However, an open bottle of alcohol is usually illegal to carry in most public places in the country. Whether they actually check or care is another story.
Really depends. I live in California where the state has two sets of open container laws. One is for motor vehicles, where any previously opened container can be placed in the trunk, and where trunk has a definition that could include the back of an SUV or even a minivan if it's behind the last row of seats.
The law on public places really kind of just punts to local governments. Honestly, the way it's written it might as well not exist since it doesn't set the law nor restrict local government in how they operate their own laws. The only thing it really does is set that having an empty container for recycling is OK.
http://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=BPC§ionNum=25620
25620.
(a) Any person possessing any can, bottle, or other receptacle containing any alcoholic beverage that has been opened, or a seal broken, or the contents of which have been partially removed, in any city, county, or city and county owned park or other city, county, or city and county owned public place, or any recreation and park district, or any regional park or open-space district shall be guilty of an infraction if the city, county, or city and county has enacted an ordinance that prohibits the possession of those containers in those areas or the consumption of alcoholic beverages in those areas.
I can't really find anything on our city or county that would make open containers in a public place illegal. Our county has an ordinance that says that a place that sells alcohol only for consumption off-site (like a liquor or convenience store) must have a sign stating that an open container is not legal on the premises (including the parking lot) or adjacent sidewalks. It's specially illegal is someone does possess an open container in that situation. I think I might have even been guilty since I brought an open bottle once to ask if there was anything strange about a bottle of Scotch I had. A neighboring city does have a law that makes consumption of alcohol illegal in a public place, but not specifically having an open container.
And enforcement and intent of the law is important. These laws exist because drinking in public is considered undesirable. Enforcement on someone with a bottle of Jack Daniel's that's previously opened but screwed shut and in their luggage is a rather low priority I'd think. If someone is taking their opened bottle of wine from a party directly to their car parked down the street, that's got to be a low priority too.
I remember we had our National Night Out on the street in a parking space where vehicles were cleared by placing tables just off the sidewalk. We had some open wine bottles and cups. I think I even drank a little bit of it. We had a scheduled visit from our fire department followed by one by our police chief. Now I suppose he didn't care or perhaps there wasn't anything specifically illegal about it.
I guess carrying my growler is considered recycling, which is specifically allowed under California's law.