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Product Use & Care

What is my MiiR made of?
All MiiR products are constructed of premium, 18/8 (18% chromium, 8% nickel) medical grade stainless steel. Our bottle lids are made of BPA free polypropylene #5, and our press fit lids are made of Eastman Tritan™. Both of these plastics have been tested and neither are known to leach harmful chemicals or present health risks. They carry no bisphenols (BPA, BPS, etc.), estrogenic activity (EA or estrogen leaching) or androgenic activity (AA or testosterone leaching). With the exception of products offered in natural stainless steel, all MiiR products are finished with a durable Hardshell™ powder coating to protect and preserve your product’s appearance.
Is my MiiR dishwasher safe?
Though technically dishwasher safe, for the longest term product satisfaction, especially for products with a Hardshell™ powder coat finish and/or custom design or finish, we recommend hand washing your MiiR in hot, soapy water with a long-handled soft bristle brush. Extremely high water temperatures and the rigorous environment of a dishwasher will deteriorate these finishes over time. All MiiR lids are easily hand washed and are also top rack dishwasher safe.
Can my MiiR go in the freezer?
No. Freezing temperatures can damage the insulation properties of your insulated MiiR (and if sealed, the vacuum insulation will prevent the inside from becoming cold anyway). To carry the coldest of contents in your insulated MiiR, simply fill with ice and enjoy.
Can my MiiR go in the microwave?
No. All MiiR products are made of stainless steel and are not safe to put in the microwave.
Can my sealed MiiR hold carbonated beverages?
Our growlers, howlers, pints and cups are all designed to carry carbonated beverages. All other products, including those with twist off, straw and travel lids are not intended for carbonated beverages.
The inside of my MiiR has developed stubborn stains. How do I safely remove them?
Never use bleach or chlorine. Instead, we recommend one of the following:
• Use an all natural cleaning tablet like Bottle Bright
• Pour a solution of white distilled vinegar and warm water (1:5 ratio) into your MiiR and let soak for 10 minutes
• Create a paste with baking soda and warm water and gently scrub the paste directly onto stains with a soft bristled brush
My MiiR has developed some white patches. Is this normal?
From time to time you may notice cloudy white spots on your Hardshell™ powder coated MiiR product, particularly after running in the dishwasher (for long term product satisfaction, we recommend hand washing). These come from mineral deposits found in the water your MiiR comes into contact with. To remove, simply boil a small amount of water and carefully pour directly over white spots, and they should clear right up.
Help! My Tumbler/Camp Cup press fit lid is leaking.
Take a look at the rubber gasket on your press fit lid, as it may have become twisted. Adjust as needed until the ridges of the black gasket are facing outward for the entire circumference to create a consistent, airtight seal when pressed into place. For additional assistance, contact us at or 888-746-5762.
Help! My insulated MiiR is making a rattling sound.
Inside the walls of our insulated products is a tiny piece of welded metal that acts as a moisture trap during the vacuum insulation process of production. Rarely will this piece become dislodged and cause rattling. Though this incident will not affect the overall performance of your product, we’re happy to make it right and get you set you up with a replacement. Contact us at or 888-746-5762.

Buyer's Guide

How do I buy/redeem a gift card?
Digital gift cards are available for purchase here. To redeem your gift card, fill your cart at and continue to the checkout page. Enter your gift card code where prompted, click “apply” and your subtotal will adjust automatically. MiiR gift cards are also valid at our Flagship store, located at 3400 Stone Way N., Seattle, WA 98103
How do I order an item as a gift?
Fill your cart at, enter in the recipient’s name and shipping address when prompted, and complete your order. We do not offer personalized messages at this time, so we recommend you share shipping information directly with the recipient.
How do I use a discount code?
Fill your cart at and continue to the checkout page. Enter your discount code where prompted, click "apply” and your subtotal will adjust automatically.

Shipping & Returns

When will my order ship?
We do our best to ship your order within 1-2 business day of purchase, M-F. Exceptions may occur if there is a question regarding your order, in which case we will contact you directly. If you have questions about your order, please contact us at

MiiR uses FedEx SmartPost service on all shipments within the contiguous United States unless an expedited option is selected by the customer.

2-Day and Overnight orders should be placed by 11:00 AM PST for quickest delivery. Expedited orders placed after 11:00 AM PST will require an additional business day for processing. This excludes weekends and holidays. All "Delivery by" dates are estimates and not guaranteed.

Shipping to Hawaii: All orders shipping to Hawaii will ship FedEx SmartPost service unless the customer selects an expedited service. Air freight to Hawaii has become very limited and as a result orders shipping to Hawaii may take an additional three weeks when traveling by boat.
How do I check my order status?
From your account page, click “order history” to view all past orders. Click on the order number for tracking information.
Lifetime Warranty & Return Policy
All MiiR products purchased from come with a limited lifetime warranty against manufacturer defects for the life of the product. Please note that normal wear and tear including scratches, dings and other marks are not covered under this warranty. Manufacturer defects include but are not limited to: micro leaks, rough welds and damages sustained prior to first use.

You may return your MiiR in perfect, unused condition for a refund or credit. To initiate a return, please email us at

If you believe your decorated MiiR product is subject to a manufacturer defect, please email us at and we will be happy to replace it with blank MiiR product.

On sale and heritage items are final sale and may not be returned.
Do I really get free shipping?
MiiR offers free shipping within the United States on orders totaling $45 or more, before taxes and discounts are added.
Do you ship web orders internationally?
At this time we offer international shipping to Canada from If visiting from the following countries, you can shop directly on our trusted partner sites:

To see your shipping rates before placing your order, add product(s) to your cart, enter shipping information and proceed to checkout. Please note MiiR is not responsible for duties and taxes your country may charge for importing products. MiiR does not collect or control these fees charged by the freight carrier after you place your order and upon import.

Taxes & Billing

Do I have to pay sales tax?
Sales tax will only be applied to your order if shipping to the state of Washington.
When will my credit card be charged?
Your credit card will be charged at checkout.


Privacy Policy
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Additional Support

Contact Us
Contact us here.
Careers at MiiR
Find out about available careers at MiiR here.

Holiday Shipping Deadlines

Make sure your gift arrives in time for Christmas!

U.S. Shipping Only
 Shipping Method Order Deadline
Standard Ground / Priority December 14th
Express Saver December 18th
2 Day  December 19th
Overnight December 20th


* For international orders, the last day to order is December 14th. Additionally, we cannot guarantee on time delivery based on international customs processes.