This is a bit of clear rubbery silicone with a gold-coated hologram on the top.
The patterns are little microchannels where liquid can flow across the surface
of the silicone; the larger round areas are where hollow needles can be poked in
from the other side of the silicone to
![(Untitled)](/content/images/size/w795/ec1b71f4f11faeff6eac615ad9ee6a5f/tumblr_mu8jeaKmKS1spzrmao1_1280.jpg)