Because you asked for it, the expandable Presion & Diamantes crossbag returns, with space for all your essentials and a little more, this time with waterproof material.
 
Measures. 35x15x7 cm (using its full capacity)
 
3 separate large spaces and 3 interior compartments for better organization.
For the daily, you can take your glasses, keys, wallet, cell phone, charger, even make a small water bottle.