Disclosed is an acrylic syrup containing a vinyl monomer of methyl methacrylate and a polymerized solid component which is a high polymer of said vinyl monomer and has a weight average molecular weight of from 30,000 to 2,000,000 as measured by the GPC and a viscosity at 25\xb0 C. The portable tank comprises an upper, a middle and a lower region. This invention further relates to a device capable of receiving and displaying two-dimensional and three dimensional images. The second layer comprises at least one of MgO and Mg.