The XTRM SNFFR was designed by XTRM in 2019 and they produce them in Austria. This guarantees consistent quality.With the double “two-noses" the circulation is fantastic and ingenious.Benefits of the SNIFFER: no skin contact with the contents no skin irritation or redness on the nose or skin 3 phase system the term "sniffing" gets a whole new dimension! Care Instructions: The SNIFFER doesn't like sun, heat, cold, detergents. Please do not leave the sniffer permanently on the bottle because it does not prevent evaporation. Safety note: approach carefully. Do not tilt the bottle, the SNFFR by XTRM are not leak-proof. The SNFFR does not need to be washed or exposed to excessive heat. Sizing: 1: Small fit the small bottles and large US bottles2: Large for all large bottles (From the EU)