Also remember 1 larger water container should be lighter than 3 smaller ones. Just my two penneth-worth.
but what about don't put all your eggs in one basket? I always carry a 1l pop bottle for day use and take a 1.5l or 2 litre sourc/platy bottle for filling for camp. But wouldn't carry 2+litres of water.(a bottle of wine maybe depending on the occasion). If you want to camp on a hilltop away from a source, and its wet n cold, it's worth having the capacity for the night. Which for me means 2l +. esp. if wanting a wash.
the Aeropress looks to make great coffee but yes too heavy for me.
The thing I use weighs 11g. I actually use it on longer trips for tea (nicer tea from leaves, and can dump leaves -unlike teabag bags which don't rot easily ) and use The Starbucks Via sachets for coffee ..
Lyons coffee bags are weak n boring and same issues as teabags.