as stainless steel or melamine preferably the cassette 50 is formed of materials manufactured for durability and cleanliness within food service environments such as stainless steel melamine or laminated plywood because the cassette 50 can be removed from its connection with the table 12 and because the cassette 50 is formed of materials manufactured for durability and cleanliness the cassette 50 can more readily be cleaned or washed such as in commercial dish washing equipment fig4 b 7 and 8 show an alternative embodiment of a portable sink 100 and cassette 50 b in this embodiment the cassette 50 b has a front a back wall 64 bottom wall 59 and side walls 56 58 that together define an internal compartment of the cassette 50 b a rod support 60 extends along the length of the cassette 50 b and is held in the internal compartment between the two side walls 56 58 at a location spaced apart from the back wall 64 the cassette 50 b of this alternative embodiment is removably engaged to a rear surface 32 of the back wall 20 that extends up from the work surface 104 the front of the cassette 50 b is placed in abutting relation to the rear surface 32 of the back wall the upper edges of the front the back wall 64 and side walls 56 58 are placed into contact with a bottom surface.