A ten-minute check at home can prevent a security-line surprise, a discarded item or an identification delay.
Use the 3-1-1 rule for ordinary liquids
TSA allows carry-on liquids, aerosols, gels, creams and pastes in containers of 3.4 ounces (100 milliliters) or less, placed in one quart-size bag. The container size matters even when a larger bottle is only partly full.
Medically necessary liquids and some other items have exceptions and may need separate screening. Review the official TSA guidance before travel and tell the officer at the checkpoint when an exception applies.
Verify identification before travel day
For U.S. domestic air travel, check TSA’s current acceptable-identification page rather than relying on memory. REAL ID enforcement began in 2025. As of this article’s publication, TSA also describes an optional paid ConfirmID process for some travelers without acceptable identification, but it can add time and should not replace advance preparation.
Confirm that the name on the reservation matches the identification you plan to use. International trips also require the destination’s passport and entry rules, which are separate from TSA screening.
Pack batteries deliberately
Spare lithium batteries and power banks generally belong in carry-on baggage, with terminals protected from short circuits. Rules vary by battery size and device, so use TSA’s “What Can I Bring?” tool and your airline’s dangerous-goods guidance for the exact item.
Before you close the bag
- Check liquids by container size.
- Place medicines and documents where they are easy to reach.
- Confirm your ID, boarding information and destination requirements.
- Review battery, sharp-object and food rules.
- Leave extra time for exceptions or additional screening.
Security rules and technology can change. Recheck official guidance for both the outbound and return airports, especially when traveling internationally.
Sources
This is an original AskNovus guide based on the sources listed above. Rules can change; verify current TSA, airline and destination requirements before departure. Image credit: CHUTTERSNAP via Unsplash.