Same, I always have a stack of empty jars, and one of murky water since both are very common loot in virtually every poi. I never toss jars, if I don't need water? I'll drink the boiled water I pick up so the jar goes right into my nice stack I got building. There is certan items I always carry on me as they are super common: Leather, cloth, glass jars, murky water, lead, brass, iron, duct tape a few other things. I have them all neatly in my inv in set places, and when the stack gets high I just put em in storage.
P.s. can you please make 7.62mm ammo stack to 300 like 9mm. Or better give Machine guns their own caliber maybe 5.56mm rounds (Craft recipe 1 bullet tip 2 gunpower, 1 brass casing), or better yet, make 7.62mm use 2 gunpowder instead of 3 also adjust the AP version to 4? I've always felt it silly how 7.62mm does less damage than shotgun shells yet uses more gunpowder to make. Shotgun slugs also need a damage increase imo due to the mat cost, or make the recipe make more sense somehow. They currently do less than buckshot. (12x8 is 96 for buckshot, slug is 80) Even on armored zombies I just use the buckshot usually takes a extra shot, the one exception is the demolisher as they have skyhigh armor.
Also the SMG needs to be buffed to match the pistol in damage, you added a full auto mod to the game, which makes the smg basically worthless as the pistol hits noticably harder and can be made full auto easly