Unfortunately, I was unable to get the food coloring to mix with the baby (mineral) oil.
I used glass bottles- I found a trio at our local Goodwill store for $ 0.99 each. I bought the baby (mineral) oil at our Dollar Store. The heart & skull embellishments I found at our local Michael's Craft Store, and the ribbon I picked up at Walmart for $ 0.47 a spool.
I hot glued the embellishments onto the bottle, adding additional once I had the piece placed. I used an exacter knife to cut around the edge of the piece to remove unwanted glue around the item. For the ribbon, I used 2 strands of a smaller ribbon (half the width of the primary ribbon), along with a different but complimentary colored ribbon about twice the width and tied a bow.
My finished product- 1 Girly Skull bottle, and 2 Gothic Heart bottles. I have the Girly Skull in the center as the "center piece), with a heart on each side. They now decorate the back of our ugly toilet. LOL