This battery-operated, hand-held cup creates a powerful whirling vortex to create the perfect mix in seconds. Works magic with all syrup or powder-based drinks. The 14-ounce Skinny Mixer features a spill-proof design thanks to its snug-fit sip-top lid. The nylon whisk is safe for underage children. Simply push the button to activate the whirling vortex. Within seconds, you'll have a perfectly mixed drink. NOTE:Colour will be sent randomly. Operation Guidance Open the bottom cap and install the 2 AAA batteries appropriately, then lose the bottom cap. Add the milk powder, coffee, cereal, water or any other fluidity granule, powder or liquid, but please make sure the whole volume less than 400ml. Close the cover in case of overflow and press the button to start automatic stirring. Press it again to stop the stirring. Cleaning Add clean water and turn on the stirring, then pour out. Or you can just rinse the internal mixer with clean water. attention When water temperature is over 75 Celsius degrees, please do not hold the cup directly in case of scalding. If there's beverage dry on the bottom of mixer, you may need stir the blade manually first. Pay attention to battery replacement. Please take out of the battery to avoid internal motor defective caused by rust damage if don't use it for a long-term. It's best for avoid long time stirring thus can extend the service life. Material: AS, PP Volume: 400 ml size 19x8 cm