Pourer adjusts to 8 sizes (5/8, 3/4, 7/8, 1 oz, 1-1/8, 1-1/4, 1-3/8, 1-1/2) and counts each pour. Perfectly measures and meaters each shot. Accurate counter counts each drink poured. Just pull the trigger, tip and release. Premeasured shot is dispensed. For your next drink, there is not need to turn the bottle back up. Just pull the trigger and release. Liq-Trol will pour any liquor - even the thickest liquors. Measured units save on liquor costs and the counter provides full accounting of all drinks poured. Adjusts to 8 different measured pours. Flexible rubber collar adapts to any bottle. Fits most bottles, excluding Patron, Cabo Wabo and 1800 (see the heavy-cork model for these liquors). One year guarantee.