I think one that hangs on the door handle is easier for puppy to use.
My Sassy started to pull on the ribbon hanging from the door key on her own

That was so cute. Now I only need to add bell.
For the floor model - "Easy Button" from Staples (if you are in U.S. or Canada).
p.s. tannerokeefe, have you made a very important decision - what to feed to your Puppy?