how would be a good way to display old bottles in lawn
You can make a bottle tree, or simple stick the neck of the bottle on a piece of re bar that you then stick into the ground. Smash in pieces and place around plants (careful that they don't blow away). If you Google bottle tree or so a search on DG different things will come up. Have fun! BTY: I have both a bottle tree and bottles on re bar (much to my neighbors dismay).
KDM, if you keep scrolling down you can find lots of answers to posts about bottles & bed springs used for yard & garden displays.