Simple drip tray that I made to fit an awesome turtle-shaped planter found here: https://www.thingiverse.com/thing:2298475 , and should fit up to ~6" diameter plant pot base.

I designed this with a flat/smooth base to avoid the need for supports underneath but be aware that with so much surface area, extra care will be needed to remove it from the build plate without damaging it. Sliding a razor blade underneath one edge and working my way around the circumference worked well for me and I had no issues!