飛行機にカミソリ・T字カミソリを持ち込める？（米国TSA・CATSA規則）

持込条件：使い捨てカミソリ・替刃式カミソリ（T字型）は機内持ち込み可能です。両刃カミソリの替え刃や直刃カミソリ（理容用）は持ち込み不可で預け入れ必須です。

受託手荷物：あらゆるカミソリや替え刃を受託手荷物として預け入れ可能です。刃先は安全のため保護してください。

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.

The handle, yes. The blades, no — loose double-edge blades are prohibited in the cabin. Pack blades in checked luggage or buy them on arrival.