You can get a tub at walmart. Get one of the clear ones and drill holes in it for ventilation.

I realize it isn't your fault, but the poor husbandry practices at pet stores are almost always to blame for young snakes like this one not eating and getting in poor condition (and, no offense meant here, your questions and the things you were trying show that you weren't trained by someone knowledgeable about these animals) and it is a frustrating scenario for a lot of people.