Yeah, started out with the bin bag and towel, or sometimes lots of toilet roll. Better than nothing.
This was my next step from the bin bag.
I do it this way...
Take diaper 1, cut the front wings off.
Take diaper 2, cut the back wings off.
Tape front wings of diaper 1 to front wings of diaper 2 to make longer wings.
Tape back wings of diaper 2 to back wings of diaper 1.
Tape cut end of diaper 1 inside cut end of diaper 2 (tape both inside and outside).
Result, one big baby diaper!
P.S. I use clear sticky tape. Brands vary though and some isn't as sticky as others.
Used to work better though when diapers were plastic backed. The cloth-style backing makes it harder to tape to stick.