Free shipping is available to all continental US addresses. We do not ship to Alaska, Hawaii, or PO Boxes.

Click here for our shipping policy

We typically process, package and ship all orders within 1–2 business days upon receipt. After dispatch, standard shipping generally takes 3–5 business days to arrive, with the exact delivery time varying by destination.

Currently, we only ship to the continental US. We plan to expand international shipping soon.

You may email our customer service at support@fastsub.com to adjust shipping address and other order details prior to shipment. No address revision will be available once goods dispatched. Please verify your information carefully before checkout.

Tracking information will be sent to your email once your order ships. You can also check your order status via the Track My Order section in the navigation bar.

Orders are shipped from our nearest warehouse (CA/GA) to minimize delivery time. We use major carriers including UPS, FedEx, and Amazon Shipping to ensure reliable and timely delivery to all eligible locations.

We offer a 30-day return policy for unused items in their original packaging with tags.

Click here for our refund policy

If your cup arrives broken, defective or incorrect, please contact our customer service via email at support@fastsub.com within 72 hours upon receipt. Attach clear photos or videos showing the problem. We offer free replacement, partial or full refund to guarantee your satisfying shopping experience.

Contact our support team at support@fastsub.com to request a return. Once approved, we will send you a prepaid return label.

Refunds are issued via your original payment method within 3 business days after we receive and process your returned item.

Absolutely! All our cups, including straws and lids, are made from food-grade safe materials and are 100% BPA-free. They meet all food safety standards, ensuring that you can enjoy your drinks safely every day.

Yes, they do! Most of our stainless steel cups are equipped with both heat and cold insulation, keeping your beverages at the right temperature for 6-12 hours. Perfect for both daily commuting and outdoor activities.

No, they won’t! Our stainless steel cups undergo a special cleaning process to eliminate any metallic taste. If the silicone sealing ring of a new cup has a slight smell, simply rinse it with boiling water and let it air-dry—the smell will quickly disappear.

We recommend hand-washing your tumbler with mild soap to preserve the finish and vacuum insulation. Do not use abrasive scrubbers or place it in the dishwasher.

Yes! We run exclusive weekly promotions Wednesday through Sunday. To get early access to deals, new product drops, and craft tips, subscribe to our email list at the bottom of the page — we’ll send you all the details right to your inbox.

Yes, our website uses industry-standard SSL encryption to protect your personal and payment information.

We accept all major credit cards, PayPal, Shop Pay, Amazon Pay, Apple Pay, and Google Pay for a fast and secure checkout.

You can reach our support team via email at support@fastsub.com