Our loon is printed with vibrant colors that won't fade over time, even when exposed to sunlight and harsh weather conditions. These UV are printed separately and applied. Handwash only! The inside of the sticker as a partially transparent white. KNOB BOTTOM - These glasses have glass knobs on the bottom. They serve to create better traction of surfaces and reduce the "ring" created on more traditional styles of rocks. FEATURES OF EACH GLASS * 10.25 oz volume. A perfect size for your favorite glass of whiskey with with room for ice * Chip resistance rims. * Made in the U.S.A. by Libbey