Dumbbell
Looks like dumbbell, strong as Klitschko

Solution

After use you can fill it with water again and use it as a light weight, or sand (medium weight) or even iron pellets (heavy weight).

Other entries in this project

Fuel of Life
AliceHilwater
17
14
7.79
Clear strength
Vibe
additio
20
16
7.65
KLITSCHKO /// mineral water