Silicone Boot Compatible (not limited to):- Compatible with YETI Rambler Bottle Chug Cap 36oz water bottle boot- Compatible with YETI Rambler Yonder 1.5L/50oz water bottle bootWater Bottle Boot Easy To Install:- Wipe clean the surface of the water bottle.- Slowly place the boot on the bottle.- Squeeze out the air from the bottom to make the boot fit the bottle.Note:- Protective water bottle bottom sleeve only others are not included.