This Custom Collapsible Water Bottle goes from tall to short quickly and easily, so it's the perfect size for storage and transport in a backpack or a bag, which makes it ideal for busy, on-the-go students and teachers. The sturdy silicone bottle holds 16 oz. and measures 10" high when fully extended and 7" high when collapsed. It is vacuum insulated to keep drinks cold up to 24 hours and hot up to 12 hours. The wide mouth opening makes it easy to add ice, and the screw-on lid is spill-resistant. Your choice of imprint will be laser-engraved on the front of the bottle as shown, so you can customize it especially for your school, Prom theme, or event. Present this handy water bottle to students as a fun and functional Prom favor, Senior Party keepsake, or graduation gift, stock it in your school store, or use it as a cool team fundraiser.