20/30 Skinny MIX of 6***Please note that current batch of clear rubber mouth and tinted rubber mouth lids may or may not have extra lubrication from the production process of inserting the rubber pieces into the lid beyond our control. This lubrication is non toxic and food safe, but appears to be a sticky medium that may or may not be slightly yellow in color (depending on the amount of excess). This stickiness DOES wash off clean and easily and is recommended that lids