飛行機にWater Bottleを持ち込める？
Yes — you can bring water bottle on a plane in your carry-on luggage. Empty reusable bottle (Hydro Flask, Yeti, Nalgene): any size, fine.
- · Empty reusable bottle (Hydro Flask, Yeti, Nalgene): any size, fine
- · Water in it: ≤3.4 oz through security
- · Fill it at a fountain or café airside — free
- · Checked: any bottle, any fill level
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💧 3-1-1 liquids rule checker
One quart-size (≈1 L) bag per passenger; every container must be 3.4 oz (100 ml) or less.
Fit is approximate — container shape decides real-world packing. Medically necessary liquids and infant food are exempt: declare them.
航空保安当局別の公式規定
Rules by security authority
United States — TSA
Carry-on
Yes
Yes — empty bottles of any size pass security. Bottled water itself: 3.4 oz or less.
Checked bag
Yes
Yes — full or empty.
Flying internationally? Security follows the country you depart from — the authority above applies at your departure airport. Customs at arrival is separate.
Water Bottleのパッキング注意点
機内持ち込み手荷物: Yes — empty bottles of any size pass security. Bottled water itself: 3.4 oz or less.
受託手荷物（預け荷物）: Yes — full or empty.
保安検査場での最終的な持ち込み可否判断は、現場の保安検査員に委ねられます。
よくある質問 (FAQ)
Frequently asked questions
Can you bring a Water Bottle in a carry-on?
Yes — empty bottles of any size pass security. Bottled water itself: 3.4 oz or less.
Can you pack a Water Bottle in checked luggage?
Yes — full or empty.
Can I take an empty water bottle through airport security?
An empty bottle, yes — through any US or Canadian security checkpoint. A filled one, no, unless it is frozen completely solid at screening.
Last verified:
Verified against official sources. Rules change — for high-stakes items, confirm with your airline and the screening authority. Our verification method →