Height corresponds to the outer height, internal height is 2mm less.
Use a rubber band to hold the containers together.
onshape document: https://cad.onshape.com/documents/1bfb165ce0429d1da8eaf8ae/w/563c4f8fdd83914dc9b640ff/e/eed2535c1db52a94246bcdae?renderMode=0&uiState=665397574bd9da1cda4818f6
The author marked this model as their own original creation.