The bottle is a mini portable product. After folding, the volume is reduced by 80% and the thickness is only 2.5- The cup cover is made of food-grade PP material, which is easy to open and tightly sealed. It is a lightweight cup, which reduces the burden of the bag since the lighter the better. Best gift idea for different occasion: various colors allow for many ideal gift options. Best gift choices for wife, bride, bridesmaid, men, wedding birthday party, Christmas, Thanksgiving, mother or teachers day. Customize your logo, suitable for company parties, exhibition marketing, anniversary, employee benefits, and other occasions. Made from silicone material, measuring 21oz, this custom square silicone folding expandable bottle 21oz. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. We offer logo printing and full packaging customization. Product Highlights: BPA-free, leak-proof, travel-friendly.