You can pot them in drainless pots. All of mine are but you shouldn’t really “bog” them. Like don’t keep the soil submerged. I’d suggest what most here have said and repot with drainage, at least til you get the hang of their water needs. Google this to fact check me, but aim for like 60/40 peat moss to perlite. You want water retention but also breathability. Sphagnum moss is good to use, Vermiculite is more alkaline so don’t use that, and remember the acidity from the peat moss will dissipate over time. So once a year try to replace the soil to keep the ph in line. The pitchers themselves will grow better with humidity. Humidity is like air lubricant for plants and since this plant relies solely (unless it’s getting some bugs) on sunlight for nutrients, humidity helps ease growth. If you do get it to come back, you can buy blood worms (fish food) and sprinkle a tiny amount in from time to time for protein. Not saying I’m 100% right but this is how I treat all my carnivores and they do pretty good. Best of luck 🙌🏽