has anyone ever needed two water bottles ? I mean hands up I have, I once did a sportive with a water bottle and an electrolyte bottle, because everyone tells you, you need water & electrolyte, and I drank all the water bottle and filled it up at the stops with water, and got to the end and realised Id just taken my electrolyte bottle out for a long ride.
YMMV but one bottle normally suffices, its not about the volume of liquid you carry its how often can you refill it that counts, and if two is necessary, they do make saddle bags for tools...
Absolutely. A lot of areas it's possible to need only one and fill it up but i've cycled in lots of places where I've needed two bottles especially if a hot day.
Anyway as for original topic I carry the basic tools to keep me going in a wedge saddle bag. Spare inner tube, patches, allen keys, couple tie wraps.
Regarding visibility as some have mentioned, I'm sure we've all seen cyclists out on a dull, grey day all in black and no lights. Entirely their choice but to me it's unwise. No question it's safer in more visible attire especially in low light. Obvious you'd think.
I'll always stop especially so if somewhere a bit remote if I see another cyclist stopped who look as if need help etc. I don't even consider if male or female, why would I. What I tend to do is slow down and shout "you OK" or words to that effect. In majority of cases get a yes so I carry on.
My view is we're all responsible for our own safety and that inc carrying drink/food/spares as required. I've been on club rides where a rider has punctured or needs tools but has literally nothing. Of course I assist but I make it known to them and ride leader that it's not good enough and in future should be self sufficient.