The Ecoffee Cup is BPA and phthalate free and at just 135g, it’s light, sturdy and fully dishwasher safe. There are no chemicals used in the of processing the bamboo. Unlike the refining process used for bamboo fabric, bamboo required for our product is not treated with chemicals. The cup also has a resealable ‘no-drip’ lid. Not suitable for microwaving. The cup is naturally sterile and will not taint or transfer the flavour of your drink.