Premium stainless steel flask keeps drinks hot or cold for hours while fitting comfortably in your hand for travel, commuting, or outdoor adventures. Sleek matte black finish and single wall ergonomic design. The wide-mouth, stay-open hatchback cap makes refills simple and easy. Keep your drinks tasting the way you intended by washing your Aero Flask between uses. Hand wash recommended. Top rack dishwasher safe. Wash before first use. Do not freeze, do not microwave, do not bleach, do not overfill.