Silver vine - This fine brown powder has to be the most mysterious catnip alternative, but it is the most popular treat cats just can't get enough of! Silver vine is a small fruit grown in Asia (cousin to the Kiwi fruit! How odd!) that is the Eastern equivalent to catnip. The powder is noted in various studies to have a higher effectiveness rate on cats than catnip- up to 95%, whereas catnip’s effectiveness rate is somewhere between 65-85%. We also offer this exact size of Silver vine as part of our Superb Sampler Set. And we also offer a much larger size for a fantastic value once you realize your cat absolutely loves Silver vine! I tell my customers to put a tiny bit of the powder in the lid, set it on the ground for their cats to lick up and then just screw the lid back on. So much less mess than catnip (bonus sales tip) and also SO potent that they can get their cat "tossed" over 100 times with this tiny tin! My "kitty contraband" is POWERFUL!