Quick answer
Rinse the Marvel Buzz Cup after every use, wash it by hand with mild soap, and let all parts air-dry fully before reassembling. Use the lid firmly seated, and never put the cup in the dishwasher or microwave.
Why hand-washing protects the triple insulation
The Marvel Buzz Cup is built with triple-insulated stainless steel, which is what keeps drinks hot for 3 hours and cold for 9. Harsh dishwasher cycles and soaking can wear down seals and finishes over time, so hand-washing is the safer habit. It takes about a minute and keeps the cup performing the way it should.
Lid habits that prevent leaks and odors
Most lid problems come from rushed assembly or leftover residue. Press the lid down evenly, check that it sits flush, and open the drinking opening before you tilt the cup. If you use the cup for coffee in the morning and a cold drink later, rinse the lid between drinks so flavors don't carry over.
Your daily Marvel Buzz Cup routine
- Rinse immediately after drinking: Empty the cup and rinse the body and lid with warm water as soon as you finish. This stops coffee oils or cocktail residue from drying onto the stainless steel. If you can't rinse right away, at least fill the cup with warm water and leave it until you can.
- Wash by hand with mild soap: Use a soft sponge or bottle brush and a small amount of dish soap. Scrub the inside walls, the rim, and the lid, paying attention to the drinking opening and any grooves. Skip abrasive scrubbers and bleach-based cleaners, which can dull the finish or damage lid seals.
- Rinse and air-dry completely: Rinse all soap away, then leave the body and lid upside down on a drying rack with the lid open. Let them dry fully before you put the lid back on. Storing the cup with the lid sealed while damp traps moisture and can lead to a musty smell.
- Seat the lid before every drink: Press the lid down evenly until it sits flush, then open the drinking opening. Give the cup a gentle tilt over the sink the first time to confirm the seal. Never carry the cup by the lid or toss it into a bag without checking that the lid is fully seated.
- Match the drink to the moment: Use the cup for hot coffee in the morning and cold drinks later, but rinse between changes so flavors don't mix. Hot drinks stay hot for about 3 hours and cold drinks stay cold for about 9. Pre-chill with cold water before a cold drink, or pre-warm with hot water before coffee, to get the most from the insulation.
Product facts
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Marvel Buzz Cup: 12oz triple-insulated stainless steel body keeps drinks hot for 3 hours and cold for 9. That window is long enough for a commute and a workday, so you can prep one drink and not rush to finish it.
Marvel Buzz Cup