I think I remember ChinaV telling us he got the light-weight tyre levers in HK?

My levers have spanner shaped cut-outs in them for that extra hand when needed, they weigh 500 g.
Overall everyrday riding kit has most of the gear in ChinaV's selection, and is about 2.5 kg which feels quite heavy in the hand but is nothing much on the bike.
I use a $2 ladies shower bag to tuck it all into, it has a convenient hanging hook and a few sections for storage including a mesh section, it zips up and is waterproof.

With an added first-aid kit and with rain gear and a safety waistcoat and a small 12v pump and torch, it is double that weight but still easy enough for carrying all together in a small backpack or on bike at less than 5 kg. Then I add a couple of liters of water and some dried fruit and a paperback and mobile phone; that is my day pack but I wouldn't add much more for longer trips.