Lightweight, easy-squeeze bottle delivers the right flow to quench your thirst. Wide-mouth opening is easy to fill with ice and water and a breeze to clean. Soft push-pull tip. Regular Hi-Flow of liquid. Ergonomic grip. We don't recommend heating the bottle in a microwave since contents can heat unevenly. We don't recommend putting boiling liquids in the Scale and Colours Bottles. Complies with food contact regulations.