You can easily make a flip flop slipper out your bottles.
Step 1: Make It Flat
first of all, you flatten the bottle.
Step 2: Tie a Knot Around The...
then you fasten and knot a string or rope below the lid of the bottle.
Step 3: Tie Another Knot in the String
Tie a knot in the string using another string as you see.
and make two holes in the bottle to pass the strings through the hole as you see.
Step 4: Place Your Foot
allow your foot to slide into the sandal.
Step 5: Have a Look at It
Step 6: Fasten the Lace
fasten the lace around your ankle.
Step 7: Here Is the Lace Ankle Sandal
now you can walk and see how comfortable it is.