Standard Ground Shipping is 100% free ($0.00) for all orders shipped to the 48 contiguous United States.

• Order Cut-Off Time: 2:00 PM PST (Monday–Friday). Orders placed after 2:00 PM PST or on weekends/holidays process the next business day.
• Handling Time: 1–2 business days (Monday–Friday).
• Carrier Transit Time: 3–5 business days (Monday–Friday).
• Total Estimated Delivery: 4–7 business days.

All orders ship directly from domestic inventory positioned within regional Amazon Multi-Channel Fulfillment (MCF) warehouse centers. Shipments are handled via standard domestic logistics carriers (Amazon Logistics, USPS, UPS, or FedEx depending on regional delivery routing).

Yes. Delivery is strictly limited to physical addresses within the 48 contiguous United States. We do not ship to Alaska, Hawaii, U.S. Territories (Puerto Rico, Guam, USVI), PO Boxes, APO/FPO military addresses, or international locations.

An automated tracking confirmation email is sent within 24 hours of warehouse dispatch containing your domestic carrier tracking number and a link to view transit progress. You can also monitor your package directly on our Track Your Order page.

AI Master LLC provides a 30-calendar-day return window starting from the confirmed carrier delivery date. Returned items must be in original, unused condition with all components (bamboo vessel, steel core, 1-piece infuser basket, bamboo lid, silicone gasket) in original packaging. We charge a strict $0.00 restocking fee.

• Defective, Incorrect, or Carrier-Damaged Items: AI Master LLC provides a 100% prepaid return shipping label at zero ($0.00) cost to the customer.
• Customer Remorse / Preference Changes: The customer is responsible for purchasing actual return carrier postage with tracking. Zero restocking fees are deducted from the product refund.

To initiate a return, email Direct Customer Support at business@hussainmuhammad.com with your Order Number and reason for return. You will receive an official Return Merchandise Authorization (RMA) number and the designated domestic returns warehouse address within 24–48 business hours.

Once the package arrives at our domestic warehouse, physical inspection is completed within 1–2 business days. Approved refunds are credited directly back to your original payment method within 3–5 business days.

AI Master LLC accepts 8 verified payment methods through our 256-bit SSL encrypted checkout:

All transactions are charged in US Dollars (USD $).

We ship exclusively within the United States. Applicable state and local sales taxes are automatically calculated and applied at checkout based on your delivery address.

Because orders are automatically submitted to our domestic Amazon MCF warehouse nodes for rapid handling, cancellations must be requested within a strict 30-minute window following checkout. Email business@hussainmuhammad.com with the subject line "URGENT: Order Cancellation - [Order #]".

The AI Master tumbler is crafted from verified, food-contact physical materials:

• Interior Core: Food-grade 304 Stainless Steel (mechanically stamped SUS 304 on base and interior).
• Exterior Shell: 100% genuine natural organic bamboo wood casing.
• Infuser Strainer: 1-piece food-grade 304 stainless steel tea strainer
• Gasket Seal: Food-grade silicone leakproof seal.
• Cap: Precision-threaded bamboo with an integrated stainless steel fold-down carry loop.

Hand wash only for the bamboo body and cap using warm water and mild soap, drying with a towel immediately. To preserve the natural bamboo wood, never submerge the bottle, soak it in water, place it in a dishwasher, or heat it in a microwave. The removable 1-piece stainless steel infuser strainer is top-rack dishwasher safe.

The tumbler includes a 1-Year Limited Store Warranty covering structural vacuum insulation failures and threading defects under normal domestic use. It excludes damage resulting from drops, impact dents, improper washing (such as dishwashers or soaking), or unauthorized modifications.