Flip the glass tray upside down. Apply waterproof polyurethane glue to one end of each of the three 18-inch solid metal bars and stick them vertically to the bottom of the glass tray. Position the bars in equal distances between each other. The bars will be the legs of your glass fire pit. Allow the polyurethane glue to dry.
Flip the glass tray over and stand it on its legs. Check that the legs are firmly bonded with the glass tray. Set an artificial rose in the center of the tray and place a glass bowl upside-down over it to see how well the rose fits. Clip the stem of the rose as needed so it fits within the bowl, using scissors. Remove the bowl and apply polyurethane glue to the rim of the bowl, then place the bowl upside-down over the rose in the center of the tray. Let the glue dry.
Apply polyurethane glue to the bottom of the other glass bowl and set it directly on top of the upside-down bowl you glued over the rose. This top bowl is the fire bowl.
Shake a gel fuel canister well and place it in your glass fire bowl. Remove the label, then remove the lid and light it with a long match or barbecue lighter.