Are both the dispenser to the left of the shelf and the dispenser that looks white made of plastic?
Yes, both the dispenser and the dispenser are made of plastic.
    src        edge_attr  dst
0     0  to the right of    4
1     0   to the left of   14
2     0  to the right of   10
3     1   to the left of    8
4     3  to the right of   15
5     4   to the left of   11
6     4   to the left of   10
7     4   to the left of    0
8     4   to the left of   14
9     5  to the right of   15
10    6  to the right of   15
11    6  to the right of    9
12    7   to the left of    8
13    8  to the right of    1
14    8  to the right of    7
15    8  to the right of   12
16    9   to the left of   17
17    9   to the left of   14
18    9   to the left of    6
19   10   to the left of   14
20   10   to the left of    0
21   10   to the left of   11
22   10  to the right of    4
23   11  to the right of    4
24   11  to the right of   10
25   12               on    1
26   12   to the left of    8
27   12  to the right of   13
28   13   to the left of   12
29   14  to the right of   15
30   14  to the right of    9
31   14  to the right of   10
32   14  to the right of    0
33   14  to the right of    4
34   15   to the left of    3
35   15   to the left of    5
36   15   to the left of   14
37   15   to the left of    6
38   17  to the right of    9