This is the type with a slightly rounded lid. I bought the same one, but it was dented. However, I purchased a larger size at the beginning of the fiscal year, so this one is unopened and unused. 350ml insulated straw mug, made of stainless steel for high cooling performance. - Brand: THERMOS - Capacity: 350ml - Cooling Capacity: Below 12°C (6 hours) - Materials: Stainless steel, polypropylene, silicone rubber - Usage: For cold beverages only THERMOS Magic Baby Straw Mug FJL-350 Blue White (BLWH) 350ml Water Bottle for Kids, Stainless Steel Vacuum Insulation, Spare Straw Set Included, Easy One-Touch Open, Splash-Proof Function Thank you for viewing.