Fragment of foot, base and part of chalice of conical bubble cup (berkemeier) with four flat studs, berkemeier drinking glass drinking utensils tableware holder soil find glass forest glass h 5,6, free blown and shaped glass application Fragment of foot bottom and part of chalice of conical bubble cup (berkemeier) in clear light green glass (forest glass) Foot (stand ring) is made up of glass wire wound around four times. pontilmark underneath the pointed bottom (2.6 cm). Hollow stem and open at the top is barrel shaped and has three large flat studs (one missing). At the transition from trunk to calyx an imposed narrow glass wire. Chalice wide from archeology Rotterdam rail tunnel drink Soil discovery: rail tunnel Rotterdam.