A shelf that has a receptacle for pots is tahor as a stove but tamei as a utensil with a receptacle. [Regarding] its sides: That which touches [the walls] is not tamei as a stove. [Regarding] its wide [side]: R’ Meir rules [it] tahor and R’ Yehudah rules [it] tamei. The same applies if one turns over a basket and builds a stove on it.