If you’ve been to Denver International Airport in the last 20 years, you know there is a size limit on the containers of liquids you can bring on a plane to or from Colorado.

Have you ever wondered why? I didn’t until recently. The rule was introduced in 2006 to prevent liquid explosives.

Containers for liquids, gels and aerosols must be no larger than 3.4 ounces, but this rule, which has been in place for nearly 20 years, may soon be abolished thanks to new technology.

We all sometimes forget at Denver International Airport

I flew out of Denver International Airport. I pride myself on being very efficient when approaching security. I always make sure my laptop is in a different bin, I have my shoes off, and my bags are always empty and ready to go.

I watched as my backpack went through the scanner and was then pushed to the side. A TSA agent looked it through, took out a sealed sugar-free Red Bull and threw it away.

I forgot it was in there. I was a little embarrassed. But I was more annoyed that I had basically thrown away three dollars.

Colorado’s liquid policy could soon change

Some airports have begun upgrading their scanners. These new scanners will allow travelers to carry containers with a capacity of up to two liters.

Would you like to bring two liters of Diet Coca-Cola? Then do it.

This sounds great and will make traveling easier. However, these scanners are being rolled out slowly. Experts predict that by 2040, all airports and scanners will be upgraded.

It is still a long way off, but the process has officially begun.