Start with a pot six inches larger then the one on the middle and make sure the one in the middle is big enough to have the flute fit inside the edge of the pot.
If you are going to use these for a festivity like a wedding (paint white, silver,wedding color). You will trim it out later with a bow to coordinate.
Fill the larger pot with garden topsoil to the point that if you put the smaller pot inside the edges meet all the way across. With the smaller pot inside nestled on the top soil add top soil to the outer pot and add pea gravel or sand to the middle pot.
Plant small plants in the rim with garden soil such as pansies or you could even use succulents.
Place votive candle center of the middle pot and add flute. Add a ribbon or paint decorative designs on outside of pot.
Small pots are not that expensive and candle flutes can sometimes be found at a dollar store. Make several for a wedding and give them away to guests that you wish to acknowledge. It will be a special gift they will enjoy.