I use it in my workout bag so I can put on my favorite cologne after showering at the gym. The cap and case keep it from accidentally opening up and either spilling, or busting the nozzle head off, which has happened to me in the past.
This is one of those products that does exactly what they're advertised to do. They are GREAT. they are easy to fill. They don't leak. I keep mine loose in my purse along with my keys and loose change - and they still look BRAND NEW/no scratches. Great product and fashionable colors. I own in orange green purple blue. Makes a great reasonable gift. Good gift idea for secret Santa.
I use this for travel. I'm on the road or flyings a few times a month. Never had a leak.