How do you bring absinthe back to the US?

You're allowed to bring back one liter of spirits for personal use free of import tax. You can put it in your checked luggage. When you come back to customs and they ask if you have anything to declare, just tell them "One bottle of liquor, 750mL, in my checked luggage." They don't need to know what kind it is, they won't even ask.

More to the point, though, why would you want to bring back Czech absinthe? Czech absinthe is universally terrible and your proximity to both Franch and Switzerland means you've got some seriously high quality absinthe readily available.

Bringing Absinthe Into The Us

United States

In 2007, the Alcohol and Tobacco Tax and Trade Bureau (TTB) effectively lifted the longstanding absinthe ban, and has since approved many brands for sale in the U.S. market. This was made possible partly through the TTB's clarification of the Food and Drug Administration's (FDA) thujone content regulations, which specify that finished food and beverages that contain Artemisia species must be thujone free.[97] In this context, the TTB considers a product to be thujone-free if the thujone content is less than 10ppm (equal to 10 mg/kg).[98][99] This is verified through the use of Gas Chromatography-Mass Spectrometry.[100]

The importation, distribution, and sale of absinthe is permitted with respect to the following restrictions:

The product must be thujone-free as per TTB guidelines,

The word "absinthe" can neither be the brand name nor stand alone on the label, and

The packaging cannot "project images of hallucinogenic, psychotropic or mind-altering effects."

Absinthe imported in violation of these regulations is subject to seizure at the discretion of U.S. Customs.[101][102]

Beginning in 2001, a product called Absente was sold legally in the United States under the marketing tagline "Absinthe Refined", but as the product was made with southernwood (Artemisia abrotanum) and not grande wormwood (Artemisia absinthium) (prior to 2009), the TTB classified it as a liqueur.

There are several different brands of absinthe sold in the US already. Although I'm not sure how they compare to the absinthe you got in Prague.

Prague is one of the towns worth-visit and to accomplish this you can begin planning your holiday with hotelbye . Beginning with the wonderful region across the Prague Castle or the Strahov monastery with its exceptional selection and end with …the complete marvelous town, Prague is merely incredible. In Prague you can even visit the little home wherever Franz Kafka worked or the beautiful Prague Castle gardens from where you could like a distinctive see of the city with its picturesque red roofs. In that city you'll never get bored. If you will go throughout the spring you will find the spring trees in bloom; in the summer you will dsicover long dusks; fall will provide you with decorative leaves and unique light and in the winter you will enjoy the complete town included with simple white snow.

put it in your luggage. Nobody looks for bottles like this in check in and if a dog is used then there is nothing to smell out since it is sealed.

I would just put it in my checked luggage.