Hello there,
Cell walls shaped as soap box are generally present in the Diatoms .
The cell wall is made up of silica and cellulose. It is present in the form of two overlapping shells called epitheca and hypotheca. The arrangement of these two shells look like a soap box. Hence, the answer of this question is diatoms.
Hope this answer helps you.
Thank you!!

Hello

Cell wall like soap box are present in diatoms

EXPLANATION

In diatoms, cell wall has soap box structure and it is made up of silica and cellulose

Cellwall in diatoms is present in the form of two overlaping shells, and these  two shells looks like a soap box

Thank you