Are you tired of asking for hot water at restaurants or lugging around heavy thermoses? Then Liini is just what you need. With Liini, you can easily prepare a bottle for your baby or toddler on the go. Liini works for both breast milk and formula. Simply pour the pumped breast milk into the bottle, screw on the Liini, and warm it to drinking temperature. To prepare formula, first heat the mineral water to the desired temperature, then add the milk powder.