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As millions of Americans take to the skies during what’s shaping out to be another summer of high temperatures, some will likely be searching for easy travel hacks to help make their journeys a little less painful.

Among the many flying tips making the rounds in recent years on TikTok, this one continues to pop up: how to get a full bottle of water through a US airport security checkpoint.

The answer is simple — freeze it first.

No, you wouldn’t be breaking any rules. The US Transportation Security Administration (TSA) is actually on board with this one.