You can buy new stoppers by visiting the Extras page on our website. Please note that we sell three types of stoppers.

• Type B is for bottles that are about 3 years old or more and have three threads
• Type C for bottles that are less than 3 years old and have four threads
• Body Bottle stoppers will just fit Body Bottles.

Please make sure you purchase the correct one. If you are unsure of the correct one to buy, please send us an email to info@yuyubottle.com.

Yes it does. Because the Cashmere Collection does not include the extendable strap feature due to its delicate material, we have included an additional White Cotton Waffle cover, (with a wearable strap) for you to experience wearing your YUYUs hands-free!

No, they do not. We found that a strap simply stretches the Cashmere. Almost all other YUYU covers come with the wearable strap feature. Our Cashmere Collection does however come with an additional White Cotton Waffle cover so that anyone ordering a Cashmere is able to experience the hand-free benefits of the YUYU!

Our Cashmere-based covers are all independently sourced from local farms in Inner Mongolia. Just like all natural knitted fibres, especially in the classic knit variety, you should expect a small amount of pilling, especially during the first few uses.

‘Pilling’ is the result of loose fibres on the surface rubbing together during wear that cause small bobbles to appear. We advise using a cashmere comb to keep your YUYU in the best possible condition. The Cashmere comb will take off the loose hairs that cause the bobbles and keep your cover looking fresh and new. Simply lay your YUYU cover on a flat surface and hold an area taut with one hand whilst combing with the other. You can purchase a YUYU Cashmere comb from our Extras page.

Follow our instructions to help reduce the smell of rubber.

YUYU Bottles are made from biodegradable natural rubber. When filling them for the first time you might notice a slight rubber odour. To eliminate this rubbery smell please follow these simple instructions:

1. Take the bottle out of the cover. Rinse it out by filling it ¾ full with hot water (never use boiling water).
2. When the lid is firmly and safely secured give the bottle a quick shake and leave for half an hour in a safe place.
3. Repeat this procedure 3 to 4 times or until the smell subsides. When you are satisfied with the reduced odour smell then you’ll be ready to place your YUYU bottle back into its cover and use as desired.

Warning: Please note that for normal use we recommend filling up your bottle with the cover still on, but please be careful if you fill without the cover on, as it will be hot. 

Use a damp cloth to keep your bottle clean and dirt free. When not in use, drain completely and store with stopper removed, in a cool, dry, dark place. We recommend hanging the bottle upside down with the stopper off so that the bottle becomes completely dry inside.The bottle should be kept away from direct exposure to sunlight. Sunlight can discolour the bottle and harm the rubber, ageing and degrading it. Do not place anything on top of the bottle during storage. Keep bottle fully extended. Keeping the bottle bent will create a crease in the rubber which will weaken it. Please be aware that in areas with harder water, the rubber can degrade more quickly, so it is important to check your bottle before each use.

Cold use: Continuous freezing and heating of the rubber, especially in hard water areas may reduce the lifespan of the natural bottle. For this reason, we recommend using one bottle for freezing and one for heating.

Warning: Do not fill using water from the domestic hot water system as this can considerably shorten the hot water bottle’s life. Prevent contact with hot surfaces, oil or grease. Do not heat in a microwave oven. This is not a toy; keep out of reach of children.