I went through my list of exercises, yesterday. I don't have any dumb bells nor any kind of home gym and I can't afford a gym membership. My resistance band snapped under the pressure! LOL What I can afford is WATER! 1L weighs 1 Kg or 2.2 lbs so a 500 mL bottle weighs 1.1 lbs and a 1.5 L water bottle weighs 3.3 lbs!
I exercised my entire upper body using exercises here and in my fitness guide using my water bottles for weights! I'd say I'm no dumb bell, but I can hear the moaning already!