These spray bottles are perfect for keeping my glasses clean. I got her to store my Windex which I keep on my desk along with a microfiber terry towel. I use them to keep my reading glasses clean. The atomizer is short stroke, forms a fine mist, ideal for this purpose. The bottle is 5 inches high and approximately 1 1/2 inches (125 x 35mm) in diameter. The cap snaps into place. I turned the bottle upside down and squeezed with moderate pressure and it didn't leak or drip. I'm sure it will fit in hand luggage. I only needed three, but at $14 a piece for 20 pieces, I like having spares. I used a smaller bottle of the same type that I got from my optometrist for three years until it was accidentally thrown away. I expect these bottles to be at least that long.
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