I'm flying across the country (USA domestic) to visit my parents next week, and I'd like to take a bottled cocktail to share with them since their liquor cabinet contains a 20 year old bottle of Mount Gay and that's it (they're wine people). It would go in a checked bag, obviously, and I would probably put it in an old screwtop liquor bottle, rather than in the smaller-size swingtops I generally use- I don't think I could trust those with a pressure change. Has anyone done this? I'm worried that 1) the bottle will break/become unscrewed and spill liquor all over my suitcase- wrap in plastic? and 2) the TSA will search my bag and take it away since the bottle has clearly been opened and refilled. Tips/reassurances/suggestions?
PS- I'm planning to bring a martinez, in case anyone is wondering. Ideally I'd like to bring two different cocktails in small swingtop bottles, but I don't think the seal would survive the pressure change..