Dropper Caps

thingiverse

This adapter fits a 1 oz dropper top to smaller bottle openings. Learn more at http://swampcastle.blogspot.com/2011/12/dropper-caps-for-extract-bottles.html. You can also find it on Shapeways, though prices may not be budget friendly. To use, print the cap and buy a dropper set at http://www.kingarthurflour.com/shop/items/dropper-caps-sized-for-1-ounce-bottles#none. Remove the dropper from the original cap and insert it into the printed one for a snug fit on smaller bottles.