Each of our sets, except for the "Mini" set (A set of props "Mini"), includes equipment with drain. For example, it can be our Working table (Props, Working table). To drain the liquid from the tray of the "Man in a Bubble" set, it is enough to pour the solution into the Working table. Then open the tap and wait until the soap solution flows out of the tray into the canister. The solution can also be poured into the Bowl on a leg (Props, Bowl on a leg), or into the Working table 2-in-1 (Props, Table 2-in-1) and so on.