While my cats love Catnip Bubbles, this brand is TERRIBLE.  It makes a sticky mess (more so than other brands.)  Most importantly, the bubbles only work for a single day and they don't work at all.  I bought this twice because I thought the first one might've been a fluke but they were both terrible.  If you live in the midwest near a Meijer store, their store brand of cat bubbles is much better.  I've had my current bubbles for a week and they are still going strong.  They are also good for giant bubbles.