For maximum insulation efficiency, preheat or precool the tumbler prior to use by filling in a bit of hot/cold water for 1-2 mins.
Immediately wash and dry well after use. Store away from other metals to prevent rust. Wash with care. Do not use abrasive cleansers or steel wool. Do not use chlorine bleach as it may cause rust. If rust spots are found inside the tumbler, add warm water and citric acid in a ratio of 10:1, leave for 2-3 hours, then wash and rinse well.
This is a tumbler for beverages only. Do not use in a microwave, oven, or dishwasher. Do not place near open flames. Do not use with carbonated beverages as these expand and may cause breakage. Attach the silicone rings correctly. Keep the product upright to prevent accidental spills or leakage. Do not leave the Day Off tumbler in the car on hot days as high temperatures can break the closing mechanism.