A new stopper that fits a 2.8,3,5,6, or 6.5 gallon glass carboy (DOES NOT FIT BETTER BOTTLE OR PLASTIC CARBOYS). Also fits a 500ml Erlenmyer flask. Made with a longer taper from a different material, this stopper does not pop out when wet. Much more reliable, it's quickly became our stopper of choice for all applications involving these size carboys.
Also will fit a 12 or 22 oz beer bottle when used upside down.
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