Hydrosoul tumblers are made of double-walled stainless steel, and are vacuum insulated for maximum temperature control. Able to hold ice for up to 24 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.