When it comes to lifting odd objects a stability ball filled with water reigns supreme.
Ross Enamait has a video of it.
He says that he filled that things with over 100 pounds of water.
First I was skeptical about the durability, but as as you can see Ross man handles that thing pretty good.
Great training tool for the summer. Anybody tried this yet?
Mine has 90 kgs now, very good for grip, core and posterior chain training. It has almost 2 years (I live in Brazil so I don’t have problem in the winter). The unstabillity is much more than in a sandbag, also has the advantage of letting have it drop on your feet without worry about injuries.
I don’t know if it can handle more weight, I stopped filling it because its 10 kg heavier than me, and I use it to train for jiu jitsu.