10 oz Sippy CupPolar Camel Sippy Cups are 10 oz. double wall insulated powder coated cups featuring removable handles, a silicone boot, and spill proof lid. The screw on lid features a hard plastic spout with a rubber leak proof valve. The cup can be used with or without the heavy duty plastic handles that attach to the lid. They offer plenty of space for personalization and can be taken apart for easy cleaning. The plastic lid may need an occasional deep cleaning.