title_body: Are syringes food grade?
upvoted_answer: Let me try and answers some of these questions. Syringes are most likely food grade since they are used to inject liquids into your flesh. But like all plastics, long term storage is not a good idea since plastics are permeable and allow gasses to pass through. Maybe the plastic they use to make syringes is some super plastic but I kind of doubt it.
  
  Your plan to suck some wine out (through the cork?) with a syringe is not without merit and you can buy contraptions that do this, but the big thing you will run into is that you need to replace the wine with some type of gas or eventually gas will leak around the cork because you created a vacuum, and spoiling your wine. You would need a way to inject nitrogen into the bottle as you are sucking out the wine.
  
  Freezing wine is always a bad idea.