Are there bottles that are not made of glass?
Yes, there is a bottle that is made of plastic.
     src        edge_attr  dst
0      0   to the left of    2
1      0   to the left of   22
2      0   to the left of    4
3      0   to the left of   16
4      1  to the right of    6
..   ...              ...  ...
99    23   to the left of   12
100   23  to the right of   10
101   23               on   10
102   23   to the left of   22
103   23  to the right of    8

[104 rows x 3 columns]