A remix of Beer Bottle Lock( http://www.thingiverse.com/thing:628847 ) which is a bottle top lock for craft beers. I customized it so different label files can be used and printed/reprinted easily. The text depth was increased slightly too. As Benjamin noted, many small luggage type locks will work( maybe these https://www.amazon.com/dp/B00TEERR7W/ref=cm_sw_su_dp ). What I like about Benjamin's design was not only the OpenSCAD design file but the hinge requires no added hardware and is printed in place.

I printed this using Slic3r on my MIni Kossel printer in PLA using .2mm layers, 20% infill and no brim.

edit the bottle_lock.scad file looking for the "include" lines. There you'll see a number of lines with "//" in front of them and those lines are commented out. If you want to change a label file used comment out the current one in use and uncomment the one you want to use. Or create your own by copying one of the label-xxxx.scad files to your own name and add that as an include file. Export the STL file, slice, print and repeat.