Stainless Steel Fusion Lock & Seal Lock Leak Proof Tumbler Transparent Plastic Lid fixed with a silicon gasket. Stainless steel is lauded for its durability and is also one of the safest materials used in the kitchen. These tumblers is safe, sturdy and efficient at storing your beverages for longer periods of time. The wide mouth design allows you to clean them efficiently to maintain hygiene. These tumblers are perfect for carrying liquids like mineral water, juice, coconut water, tea, coffee and cold drinks while travelling. As these tumblers are airtight, they do not allow the liquid contents to seep out and ruin other items in your bag. Perfect for office workers, drivers, students, teachers, BBQ experts, party favours, sailors, etc. so why not choose ones for your family and friends as Father's day and Mother's day gifts or birthday gifts.