I love Lykoi Studios Starter Seed Tray with Self-Watering Base. But their seed cups, not so much. The flat cups that you fold up just weren't working for me. I designed a replacement that print as one piece with no supports. Main plate is all 49 cups, and second plate with a test one. Please test fit, just to make sure the variance is OK. You can scale 1-2% up or down. These cups have a slight taper from bottom to top so they sit in the tray without touching the bottom. Their funnel fits around the outside just fine.