Plastic bottle bottom SET with finger grips for acrylic pour painting! This set comes with 3 reusable plastic “bottle bottoms” in 3 different sizes, great for different-sized canvases and various projects. This bottle bottom set includes 3 bottle bottoms, one each 4″, 3″, and 2″. These are very easy to use and are great for acrylic pouring fluid art techniques. These can also be flipped over and used as a pouring bowl! Please see "details" for care instructions.