Top Questions

1. Are OISIZ bottles dishwasher safe?

Most of our products are designed to be dishwasher safe. Only a few products that have special finishing, will need hand washing. You can find the specific information on each product’s page.

2. Are OISIZ bottles microwave-safe?

The stainless-steel bottles should never be microwaved. And unless you want to end up on one of those “fail videos” on YouTube, we recommend you follow our advice.

3. When will my order be delivered?

In general, shipments in the United States take about 3-5 business days from the date of fulfillment. For a more specific answer, use the tracking number that was provided with your receipt.

4. What are the instructions for use?

  • Wash before use. 
  • Lid is top-rack dishwasher safe. 
  • Hand washing the cup is recommended to preserve its finish. 
  • Do not use harsh chemicals (such as bleach, abrasives, etc.).
  • Do not microwave, freeze, or boil.
  • Not for use with hot, carbonated, or perishable liquids.
  • Avoid accidental opening on the bottle by keeping the button free and clear or other objects.
  • Cover the button with the loop to help avoid accidental pushing of the button.
  • When opening the bottle, keep fingers away from the recess behind the spout cover.
  • Drinking hot liquids presents a risk of injury.
  • The straw allows generous amounts of liquid to be drawn suddenly into the mouth from the bottom of the bottle where the temperature of hot liquids is usually higher than it is at the liquid’s surface.
  • Hot, carbonated, and perishable liquids and other contents may build up pressure within the bottle and unexpectedly leak or spray out. Pressurized contents also may cause the spout cover to open rapidly enough to injure fingers positioned in or near the recess behind the spout cover. Always open with caution.
Product Care

1. How often do I need to wash my OISIZ bottle?

How often do you shower? Daily seems like a good idea…but that’s up to you.

2. How do I clean the different parts of my OISIZ bottles?

OISIZ brand products are designed to be as simple and easy to clean as possible. Best practices for cleaning each part may vary.
Lids: All lids are top-rack dishwasher safe. For a more thorough cleaning, use a sponge or straw brush to access the nooks or smaller spaces.
Straws: The straws can be easily removed and put in the dishwasher’s silverware bin. Cup: the cup is made of stainless steel, most of them are top-rack dishwasher safe. Some of the cups with special finishing need hand-wash with warm, soapy water.

3. Are OISIZ bottles freezer safe?

Stainless Steel: We’re assuming that if you want to freeze your bottle, it’s because you want your liquids to be cold. But here’s the thing: our stainless-steel bottles are triple-layer insulated, which means that the liquids are insulated from the temperature outside of the bottle. So while yes, the bottle is technically freezer safe, we just recommend putting a few ice cubes in the bottle instead.

4. How can I check, update, change, or cancel my order?

We get it, mistakes happen all the time!  If you placed your order within the last 10 mins it’s possible that you can still make changes to your order by emailing us at service@oisiz.com. If it has been a little longer, chances are that your order is a little too far along the fulfillment process for us to make changes.  If you couldn’t make changes to your order please submit a return request. We’re more than happy to take care of all the return arrangements. To request a return label, email us at service@oisiz.com. In the meantime, you can check on the status of you order on https://www.swiship.com/track/

5. Do OISIZ bottles have a warranty?

We’re proud of the quality and craftsmanship of our bottles and stand behind each bottle we manufacture. If you’re unsatisfied with your product, or if you’ve encountered a manufacturing related issue, please submit a warranty claim and our experts will carefully review your case. Please email Service@Oisiz.com to submit your claim.  While we’ll be extra gracious with your claim, please be aware that there are certain damages we can’t cover. Some of these damages include: 
 Accidental damage
 Improper care or misuse
 Normal wear and tear 
Not sure if your case will be covered under warranty? Submit a claim anyways and our team will help you with alternative solutions on the off chance we can’t cover the damages under warranty. 

6. What payment types do you accept?

We accept all major credit cards. We also accept Amazon Pay and Paypal. No cash or check—unless you’re willing to make the trek to our headquarters, then we might be willing to make an exception.

7. What is OISIZ's return policy?

Any unused OISIZ bottle in its original packaging can be returned for a full refund within fourteen (14) days of the original purchase date. Once we receive your return we will process your refund within 10 business days.
To initiate the return process, please file a return request by contacting us at service@oisiz.com
Please note that, unless the issue is the result of an error on our part, you will be responsible for return shipping costs.

8. Where does OISIZ ship to?

Currently, we only ship within the United States.

9. Does this water bottle test for lead?

Yes, this bottle passed the FDA test for lead, it’s also BPA-free, no-toxin, and dishwasher safe, and the OISIZ water bottle has a lifetime warranty.
Troubleshooting Tips for Difficulty with Sucking Water from Kids Bottles

A couple of potential reasons for the difficulty of sucking water from the bottle.

  1. Air Valve on the Lid: Please take a look at the attached picture of the air valve on the lid (on the back of the lid). Ensure that there is a small hole present in the air valve. If there is no hole, this could be the reason your child is having trouble extracting water from the bottle. You can use a needle to gently clear any blockages in the air hole. 
  2. Transparent Spout: While it’s a rare occurrence with new bottles, sometimes the transparent spout may not be positioned correctly. This typically happens when parents disassemble the spout for cleaning and then reassemble it. Please check to ensure that the spout is well-positioned. When reattaching the spout, Try applying more pressure when pushing the spout until you hear the click and notice there’s no gap between the spout and the silicone part. You should feel resistance when flipping the spout, indicating it’s fully attached.