To be part of the ever-growing trend of being eco-friendly by cutting down on plastic straws! Collapsible silicone Drinking Straw in case,BPA free.Most important thing is it leaves no plastic waste and no plastic aftertaste. Also, it is neatly stored,and can be easily taken out or put back in the case. The whole package is of a keychain size, small enough to toss into your bag or purse. best used with tea, water, juice in Tumbler.