• What are your tumblers & mugs made of?
  • Our double-wall insulated tumblers, bottles and mugs are made out of 18/10 kitchen-grade stainless steel. They’re also BPA free.
  • Does SUNWILL tumbler fit cup holders?
  • The travel tumblers and skinny tumblers fit most cup holders. Each item has different type. Please check product description for size and details.
  • How do I get the replacement lid?
  • Yes, you may find replacement lid at the relevant product page of your cup. If there is any question about the size, please contact our customer service.
  • For how long does SUNWILL tumbler keep beverage hot/cold? Are your tumblers vacuum insulated?
  • Our tumblers is vacuum insulated which can lock beverages in the temperature for hours. Normally keep drinks hot for 3-6hrs and cold for 12-24hrs.
  • What is the best way to clean the lid?
  • Coffee Mug: the slider part of the lid can be removed and cleaned. It is held on by two tabs, and can be detaching by gently pushing inward. The attached picture 1 shows how to detach it, and picture 2 shows how it looks after detach.Besides, the lid is dishwasher safe (no more than 155℉) and please take the gasket off before washing.
  • Travel Mug:
    1. It is dishwasher safe (no more than 155℉) and please take the gasket off before washing.
    2. Soak the lid completely for a while before washing. Some customers tell us it is a good way.
    3. If push hardly through the drinking hole, the lid can be detached for cleaning underneath and attach back after wash. However, it is tight as a new one.
  • We have a video about sliding cover detach, it can be found at the description page of the tumbler on the web or as following: https://youtu.be/H2n8PIbzt7Q
    • Gift sets available?
    • The gift sets are available for wine tumblers, 14oz coffee mugs, 20oz travel tumblers and some skinny tumblers. 
    • Is it leak proof? 
    • Please note the lid is to keep drinks contained and prevent heat/ cold from escaping. It is not 100% leak proof.
    • Are your tumblers and mugs dishwasher safe?
    • Please wash the tumblers and mugs before first use. Do not use softners or bleach, and hand wash is recommended.
    • Can this tumbler be customized with monogrammed sticker?
    • We do not provide personalization service. However, all our tumblers/bottles can be monogrammed with laser engravation or decal sticker. 
    • Is there a return policy?
    • If you have any questions, please contact our customer service and we will reply shortly. We are happy to provide money back if you are not fully satisfied with the tumbler.