Fragment of bottom, base and part wall of cup (with diamond pattern) In clear colorless glass, mug drinking glass drinking utensils tableware holder soil find glass, hand-blown mold blown Fragment of bottom foot edge and part wall of cup in clear colorless glass. Pattern blown into the mold and then blown out freely. Pattern lines continue under the bottom of the Pontil mark under the raised bottom. On foot continuous imposed glass thread as stand ring foot edge. Unclear pattern to be recognized on the wall: diamond pattern archeology Rotterdam rail tunnel drink Soil discovery: rail tunnel Rotterdam.