Milli’s beautifully designed and thoughtfully crafted shake-to-make bottle is made of durable borosilicate glass and a soft-touch silicone coating. We’ve printed a fill line on the front of the bottle so no measuring is needed to prepare milli. Simply add your milli freeze-dried mix to the bottle, pour water to the fill line, and shake up delicious mylk in seconds. We are always thinking about how to sustain Mama Earth, re-usable glass bottles can go a long way in helping eliminate plastic and waste. Dishwasher safe.