Oy Vey mug. Back reads: Schmutz happens. Those familiar with Yiddish sayings may get verklempt upon seeing them on this whimsical mug! Great gift for a Jewish household with a sense of humor. Part of a fun and functional collection of unique Judaica pieces. Interior is turquoise blue. This is a handmade mug created from stoneware clay kiln fired to over 1900 degrees. Measures 4 x4 and holds 16 oz- safe to place in the dishwasher or microwave.