Take two bottles, which you think are good enough for a hourglass and easily available around you.

Step 1: Join & Color

After pasting the tape on top of them join both of them with a glue gun and the plastic from the remaining bottle.

And then color them with acrylic spray paints of your choice on the outer side.

Remove the tape carefully and clear the shapes from a thinner, nail polish remover.

Step 2: Join & Color

After pasting the tape on top of them join both of them with a glue gun and the plastic from the remaining bottle.

And then color them with acrylic spray paints of your choice on the outer side.

Remove the tape carefully and clear the shapes from a thinner, nail polish remover.

Step 3: Join & Color

After pasting the tape on top of them join both of them with a glue gun and the plastic from the remaining bottle.

And then color them with acrylic spray paints of your choice on the outer side.

Remove the tape carefully and clear the shapes from a thinner, nail polish remover.

Step 4: Final Step

Now stick the colored wooden piece on one side from glue gun and pour the red sand in to it, you can add other colors if you like.

And then close from the other side as well.

Congratulations, now you have a hourglass of your own design and colour combination and fully functional.