These glass test tubes with a cork are perfect for experiments with liquids and density or crafting potions with your kids. You can also use them as a fun party item to hold single shots or as a simple and sleek decoration. Details: Clear 3 fl. oz. (85 mL) 10 test tubes and corks Food safe Glass and cork Recommended for indoor use Care & Usage: Wash before first use Not microwave safe Cold liquids only Glass is dishwasher safe Hand wash cork and dry immediately