With the locking lid, there appears to be more heat transference than the open mouth lid. Even with the locking lid absorbing more heat, it does provide a few degrees more heat retention over time. Like most things in life, there is so much more that goes in to your coffee than flipping on your… Continue reading Ozark Trail 10′ x 10′ Instant Pop-up Slant Leg Outdoor Canopy Type Sha Couture Flair Hub