Finally, always look out for safety considerations when choosing a rabbit—materials like body-safe silicone or non-porous ABS plastic will be your best bet as they’re less likely to contain harmful chemicals that could irritate sensitive areas.

Source: https://www.chartattack.com/secret-to-intense-orgasms/

Those keycaps may disappoint some people though, because they're ABS plastic rather than PBT doubleshot.

Source: https://www.pocket-lint.com/roccat-vulcan-ii-max-keyboard-review/