>>1809465Any lock can be defeated with the right tools - U-locks are just slightly harder to defeat. The real advantage to them is they have a much higher deterrent value because a cable lock is cheap and easy to cut with common tools, but someone has to be make preparations in advance to break open a u-lock.
>>1809458A good analogy is to think of a 1lb weight and a 100lb weight - you might struggle to lift the 100lb weight 10 times, but you can lift a 1lb weight 1000 times without break a sweat - gearing on a bike is like that, you want to be a gear ratio that you can pedal without straining and tiring yourself out, but too low and you'll be slow and not able to keep up with the pedals.
>>1809328Nothing wrong with that if you're careful to clean it thoroughly after every use, otherwise you'll end up with rancid milk in your bottle. But deep cleaning your bottle all the time is annoying, so most people use them for water only.
