TOUGHEST of the Tough
20 hours hot, 20 hours cold
1.0 MM 18/8 Stainless Steel (The strongest you will find by far)
Rust-proof+ naturally BPA-free
Quadvac insulation
Steel-lined stopper
Vacuum insulated SS cup stays cool to touch
Leak proof and fully packable
Dishwasher safe
Lifetime Warranty