塑料的好看防水，但怕甩，现在机场都扔

如果怕有人塞货，拉链的用一只笔就打开。

最好的是这种铝壳的，几面都有锁：

https://www.amazon.com/LEVEL8-Luggage-Aluminum-magnesium-Carry-ons-Suitcases/dp/B07MXDR5RB/ref=sr_1_25?crid=SBNSDWEYKAIF&dib=eyJ2IjoiMSJ9.ERdGotBLpV8UlWHe1KpNSj96GfE5XMLYS4OsZQB70K1glYPxAuJKIaoCEFnPJbJH-VxJrVAlIpMDSI1GXS3YYGdO6NKKNUDvL85cvCVb5P6_p6Qo-6n7V2EwfCEo7cldc_ysTehJBDG4L-gVYbw450oNc-OfL_t5T4QCoTiwYHmetU14CkQ4fMrXFlHTsqo03f_5CEo0gowZu6ZmhJfFxzeE1XuhLPsGpYGu25YW_JN2lQDiMfYu1igZT88LwE1rYefoqjv5bKlpgaQzMdeAWvYwS1zEgweLfr0kamg8Uxo.I6Hp9AUgcPhDcNOeDGOun1YkEaWrLQEZbjJop3sZQU8&dib_tag=se&keywords=luggage%2C%2Baluminum%2Bhardside%2Bsuitcase%2Bwith%2Btsa%2Block&qid=1722885863&sprefix=luggage%2C%2Baluninum%2Bhardside%2Bsuitcase%2Bwith%2Btsa%2Block%2Caps%2C126&sr=8-25&ufe=app_do%3Aamzn1.fos.1740e8b9-be2d-46a4-a376-9d8efb903409&th=1