It sounds like you’re looking for a blue stainless steel 30 oz water cup. These types of water cups are known for their durability, ability to keep beverages cold or hot for long periods (due to insulation), and are often favored for hydration during outdoor activities, workouts, or for everyday use. Some common features for such a water cup include:

• Insulated design: Most 30 oz stainless steel cups are double-walled and vacuum-insulated, which helps maintain the temperature of your drink.
• Leak-proof lid: Many come with secure, spill-resistant lids, sometimes with a straw or a wide mouth for easy sipping.
• Sweat-free exterior: The insulation prevents condensation, so you won’t see any moisture on the outside of the cup.
• Durable & eco-friendly: Stainless steel is long-lasting and a more sustainable alternative to plastic.