Duty-free liquids on a connecting flight in the US

I am going to the USA next week and want to bring some bottles of the good stuff as presents for my relatives living over there.
My flight was cheap however it requires me to make a stop over.
- Glasgow to Newark
- Newark to Seattle
My question is regarding the security issue with Liquids.
You are only allowed 100ml containers with liquid however if you buy stuff in Duty Free in the Airport before your connection are you able to get past this restriction.
e.g.
If I buy a bottle of Whisky at Glasgow international airport and carry it with me on Hand Luggage, will I not be allowed through with it when I get my connection flight from Newark. Or am I past the security barrier when I come of the plane and wont go through any baggage checks?
Best Answer
Since you are flying internationally, you will have to clear customs and re-check your baggage at Newark. You can carry your duty free purchase on board the Glasgow-Newark leg of your journey, and can then simply place in your checked baggage in Newark, for your onward connection.
Some more information is available from the TSA website.
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Can you take duty free alcohol on connecting flights in USA?
You're limited to 5 liters of alcohol between 24%-70% ABV or 48 \u2013 140 proof. If you purchased the alcohol overseas and have a connecting flight in the United States, the alcohol is allowed in your carry-on bag if; The bottles are packed in a transparent, secure, tamper-evident bag by the retailer.Can you take duty free liquids on connecting flights?
You can take duty free liquids onboard your flight to the US. If you'll be transferring to an onward connection after landing in the States, you should pack your duty free liquids into your hold baggage at the transit point (take care not to exceed your baggage allowance in doing so, though).Do you have to clear customs on a connecting flight in US?
Do you have to clear security after going through immigration? Yes, if you have a connecting flight to another destination you'll have to clear security again. Some airports have a special security lane for transit passengers, while others make you go to the main security checkpoint at the terminal to clear again.Can you buy duty free on a layover?
Note: When traveling internationally and shopping duty-free (a great thing to do on your airport layover), the cashier at the register is going to ask to see your boarding pass to verify travel out of the country. Travelers leaving the United States for at least 48 hours may shop duty-free.U.S. Customs and Duty-Free Allowances: Everything You Need To Know
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