The 3.3 cm wide opening allows for comfortable drinking and easy insertion of ice cubes. The bottle does not form a condensation film on the outside and has been designed to save space to accompany you on any adventure. The bottles are made from high-quality 18/8 food-safe stainless steel and are therefore 100 Percent phthalates, BPA and plastic free. Drinks such as juice or water can be kept cold for up to 24 hours and tea or coffee hot for up to 12 hours. 24B437