Here's the link to the pinterest post I found:
In my area, I have to order the Gerber ones online; not available in store. I'm impatient. So I decided to make the same thing I found on Pinterest, but use size 2T panties instead! So here's my tutorial. It took about 30 minutes to make ie pair, and a total cost of about $2 per pair! Thats way cheaper than buying the gerber ones to start, because a 3 pack is at least $8!
Toddler panties (I bought mine real cheap at dollar general)
Scissors (rotary cutter us better, but I don't have one)
Flannel (I bought a yard, but it will make TONS!)
PUL (they have this at hobby lobby, it's about $15 a yard, I bought 1/4 yd, it only takes a little!)
The thick lined cloth diapers
Paper to make a pattern
Using the panties, trace their shape on paper to make a pattern.
Take a padded cloth diaper and cut it in half, width wise. I served the cuts to make sure they sealed well but you could use a zigzag stitch if you don't have a serger.
Using the pattern you made, cut the cloth diaper, 4 layers of flannel (you might want to use 2 or 3, depending in how thick you want it), and one layer of PUL to fit the panties. I also zigzagged the cloth diaper to seal the padding.
Turn the panties wrong side out. Pin the cloth diaper with 2 layers of flannel into the panties. I put the flannel against babies skin, thought it would feel better. Sew into place.
Turn panties right side out, pin 2 layers of flannel under the layer of PUL. Sew into place.
POTTY TRAIN! :)