Pot Melt Bowl Assortment 2 contains all five patterns with rectangular holes! Enjoy the glass color blends you get when melting glass in these five bowl patterns! Stack your fusible scrap glass into this sturdy ceramic pot melt bowl to create a unique marbled glass. Rest your glass filled bowl on Slumpy's Pot Melt Support (SM-8400) inside the kiln. Once hot, the glass will flow out of the opening and onto a line kiln shelf below.