飛行機にドライシャンプーを持ち込める？（米国TSA・CATSA規則）

持込可：100ml（3.4オンス）以下の容器に入れ、容量1L以下のジッパー付き透明プラスチック袋に収納してください。

受託手荷物：預け入れ可能です。100mlを超える大型ボトルもスーツケースに入れて預けることができます（スプレー類の制限に注意）。

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

Yes. Major brands such as Batiste, Living Proof Perfect hair Day, Moroccanoil must comply with standard security limits based on physical properties rather than brand labels.

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.

Yes. Aerosol cans of 3.4 oz (100 ml) or less go in the liquids bag; bigger cans fly in checked bags. Powder versions are limited separately (≈350 ml).

The aerosol form does — it’s a pressurized toiletry, so the 3.4 oz rule applies. Loose powder is not a liquid but has its own powder limit.