A mini folding mug that folds down to 20% of its original volume. The lighter the cup, the better the bag. The cup body is made of food-grade silicone, FDA tested and certified, odorless and BPA-free, with several features such as softness, good elasticity, biodegradability, and long life. The lid is made of food-grade PP, easy to open, and tightly sealed. Suitable for a variety of scenarios applications, such as sports and fitness, business trips, daily life, etc. Support custom logo and custom cup color. Measuring 8.86*2.76 inches (2.56 inches), this custom 21oz silicone folding mug outdoor sports water bottle. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Customization available: Print your logo or customize packaging and color schemes. Product Highlights: BPA-free, leak-proof, travel-friendly.