This tentacle ring. It is awesome. Slightly adjustable, doesn't turn your finger green. Pretty high quality for $14. https://www.amazon.com/gp/aw/d/B01A6NQD1K/ref=mp_s_a_1_5?ie=UTF8&qid=1471128875&sr=8-5&pi=AC_SX236_SY340_QL65&keywords=tentacle&dpPl=1&dpID=41TjhBjT8lL&ref=plSrch