1.Beverage flask volume- 20 pack flasks in 2 dimensions.2.Beverage flasks - made of BPA free food grade plastic material, odorless and leakproof beverage flasks are freezable, you can refrigerate the beverage in summertime for a cooler experience .3.Wide application - suitable for bringing liquors on cruises, also good for bringing water, beverages, wine and more when going to the theater, camping, fishing and doing other activities.4.Reusable and durable - smooth plastic material, easy to clean and reusable for a long time.5.Concealable plastic bag - every bag has a screw cap, which helps to seal the bag tightly, collapsible plastic bags are not easy to broken, you can fold them for easy storage.