The Splitflask’s effectiveness is rooted in its vacuum insulation technology. Here’s a simplified explanation: \t•\tVacuum Insulation: The space between the two walls of each chamber in the Splitflask is a vacuum. This vacuum acts as a barrier, preventing heat transfer by conduction or convection. \t•\tHow It Works: \t•\tFor Hot Liquids: The vacuum insulation helps prevent the heat from your hot drink (like coffee) from escaping. It means the drink stays hot for a longer period. \t•\tFor Cold Li