Hydrosoul tumblers are made of double-walled stainless steel, and are vacuum insulated for maximum temperature control. Able to hold hours, these tumblers are at the height of drinkware. The Calm Cup is a small (230mL), transportable tool to suit any on-the-go lifestyle. Crafted from food grade stainless steel and BPA free, each Calm Cup is individually gift boxed in a natural craft box, and in addition, offers brilliant mirror finish branding for your business.