XTRM SNFFR Double Small LeakproofWith the double two noses" the circulation is fantastic and ingenious. The new double SNFFR with push button kick channel function. The new hold down click button prevents vapour and liquid leakage. As always, the SNFFR 2. 1 is screwed onto the bottle. Our new click function opens the 3 kick channel and the aroma flows through it. If you let go of the button, the aroma stops running out. Vapor proof and leak proof! Benefits of the SNIFFER: no skin