The love glass hand boiler is not just a decorative piece but also a fun and interactive toy. When held, the liquid inside rises and bubbles, demonstrating the principles of heat transfer. This makes it an excellent education tool for kids and a fascinating conversation starter for adults, ideal for office desks or living room tables. Features -Color:Sky-blue -Material:Glass, liquid -Size:16.50X6.00X5.00cm/6.48X2.36X1.97in -Innovative functionality liquid timer: experience the change of heat transfer as your body temperature interacts with the hourglass, creating a dynamic and engaging display -Elegant liquid timer table ornament: designed to be a centerpiece, this hourglass adds a refined touch to your dining table, office desk, or bookshelf - glass construction liquid timer: made from glass materials, this hourglass makes sure high durability while maintaining its delicate appearance -Suitable present idea: a thoughtful and creative present for friends, family, or colleagues, suitable for occasions like birthdays, housewarmings, or holidays -Funny toy liquid timer: watch the liquid as a calming activity, making it an ideal desk accessory for relaxation during work or study Package list: 2 x temperature-sensitive hourglass