I'd also suggest a Targus Defcon [ https://www.amazon.com/Targus-Notebook-Computer-Security-PA400U/dp/B00000J3UJ%3FSubscriptionId%3DAKIAILSHYYTFIVPWUY6Q%26tag%3Dduckduckgo-d-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3DB00000J3UJ
] or similar motion-sensing lock. They are sold as gun locks and computer locks. Basically a big plastic combination lock with a 2-3' long thin steel cable that can be secured to anything. If someone casually grabs your "something" and tries to walk off with it, the alarm screams loudly enough to make sure someone is going to notice.
On clearance or other brand, sometimes under $10. At retail, $20.
Easy way for anyone who is traveling to be able to close their eyes, and not worry about a bag walking off. Or someone going to tamper with it in some other place. It is not "high security", but it is good at making a ruckus.