Wash, clean, and dry the plastic bottles. Determine the height for the planters and mark the bottle (from its bottom end) using a temporary marker. Use an Exacto knife to cut out the marked bottom end of the plastic bottle.

Try keeping the top open end of the bottle’s bottom cutout part as straight as possible. You can use scissors to get even top end for the planter.

Select acrylic paint of your choice and apply a coat on the outer surface of the bottle cutout. Allow the 1st coat of paint to dry and then apply another coat. Allow the 2nd coat to dry entirely as well.

Add googly eyes to the painted planter. You can add 1 or 2 eyes, however, you want. Use craft glue to attach the eyes to the planter.

Use a black sharpie to draw a smile or mouth of the monster on the painted bottle planter.

You can add more details to the monster planter if you want to.

Add mixed soil and plants to planter and display!