Interestingly when visiting a forum for my home town online I mentioned that on Saturday, after a bit of roof dancing and running up and down a ladder a few times trying to find a fault on an aerial (I'm a radio Ham .. HAH HAH !!) which is a bit harder for me these days as I'm a bit wobbly for that sh1t, I stated that when I'd finished I dropped half a bottle of gin (with tonic !! not straight. Very hot and sunny day.)
I was asked by one lady member if my half a bottle was from a 35cl or 50cl. (They do gin in litre bottles !! ... I didn't actually know that.
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I have gone metric in most things, but not drink. It's still pints and gills for me. Being adept at lying about my drinking to my GP, (also female) I replied 0.616 pints. I don't yet know if the forum lady believed me ... I'm bloody sure my GP didn't.