No leaks with the small bottle of Park CL-1 with twist-top dispenser. I carry it occasionally in my tool bag, in a ziplock bag for safety. But it hasn't leaked.

Seems to be an okay lube. I have to clean and lube the chain every other week. I'm up to about 75-100 miles/week, a mix of paved roads, gravel, and quite a few puddles lately due to rain although I don't often ride in the rain. Takes about two weeks of that before I can hear the drivetrain a little, even after wiping off the chain but not wet-cleaning it.