I was at the lumber store and spotted some free wooden pallets, and hit on the idea of using a pallet to make a tray for my carnivorous plants. With some pond liner to seal it, I made a nice wide tray with a consistent depth, humidity, and easy maintenance, and it looks tidy too.
A wood pallet, free from lumber store
Pond liner from pet shop. See step 5 for size.
Extra boards (optional)
Extra nails (optional)
Step 1: Take the Boards and Nails From the Pallet
I pulled off all the slats except for two, which will be the start of the tray.
Step 2: Saw the Pallet in Half
Step 3: Put Boards on the Side and Bottom of Your Tray
If you don't have enough boards or nails you'll just have to go out and buy some. I used a couple of slats to make sides for the tray.
Step 4: Finishing the Bottom of the Box
Step 5: Line the Tray With Pond Liner
The tray liner you get should be large enough to wrap around all the sides. Since the tray is six inches tall, an extra foot and a half all the way around is good. Don't forget the 2x4 in the center of the tray is going to use of a foot of length.
The liner came from a pet store and was about $1 per square foot.
Tuck it in, and make neat folds in the corners.
If you want the corners to be perfect, leaving the liner in the sun for a while or heating it with a hair dryer will make it easier to mold to the shape of the tray.
You can glue the liner if you want, but gravity, the water, and the plants will hold everything in place.