Hello there! Your hamster looks so adorable! I also recently purchased a Russian dwarf hamster. His name is Boris. My mistake was that I bought a hamster and it was a spontaneous purchase and kept him in my old aquarium, without water of course, and he wasn’t happy there. My uncle used to keep his hamsters in the aquarium as well, so I had no idea that a cage is always a good option. I found some tips online about how to take proper care of hamsters and not to make their lives miserable. You can check it out, maybe you will find something new for your Sasha.