This two-piece soap dish was designed in Tinkercad since I couldn't find a good looking soap dish that didn't drain straight to the countertop. There are two versions of the tray, one with retaining clips and one without.
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The base does not require supports, however the tray should be inverted and supports used underneath. I suggest printing in PETG, however you could use ABS then acetone smooth it to seal the surface against water penetration. I do not suggest using PLA as it becomes soft with exposure to water and especially hot water and the dish will require rinsing to remove the soap that drains through into the base.