I have a small cobalt blue triangle-shaped bottle -- my approx. measurement is 1 7/8" tall, each side 1 1/4" -- looks like it could have been burned (?) as it's kinda "slumpy" on one side, slightly concave, and tho not broken has quite a bit of unevenness, roughness. Each point of the triangle sides has a line of small raised bumps. The bottom, a little bit concave, has an M in a circle and there's an x or plus mark on one side of the "M" and a minus on the other. Any ideas? Can't post pics until I relearn my camera and computer workings!!