飛行機にリップクリームを持ち込める？（米国TSA・CATSA規則）

持込可：固形アメニティ（リップクリーム、スティック制汗剤、固形石鹸）は機内持ち込み手荷物として自由に持込可能です。

受託手荷物：預け入れ荷物として制限なく預けることができます。

Standard carry-on baggage size allowances apply; TSA publishes no individual numerical cap for personal use.

Standard toiletries and liquids conforming to the 3-1-1 rule (containers under 3.4 ounces / 100 ml inside a clear quart bag) require no separate declaration. You simply place the bag in a screening bin. Medically necessary liquids exceeding 3.4 ounces must be verbally declared to checkpoint screeners before inspection.

If liquid containers exceeding 3.4 ounces (100 ml) are detected in carry-on baggage without an infant or medical exemption, screeners will not allow them past security. Travelers must surrender the item for destruction, return outside security to place it in checked luggage, or mail it home.

No. Solid lip balm sticks are not liquids under the 3-1-1 rule and can go anywhere. Liquid lip gloss, lip oil and squeeze-tube balms do count and must be 100 ml or smaller.