5pcs/lot Novelty Retro Glass Beautiful Design Happy Drinking Dipping Dippy Bird Duck Bobbing Kids Festive+

Drinking Bird,USA ASTM certificate happy bird, perpetual motion bird ,children education toys

Description:

The Original Drinking birds are toy heat engines which mimics the motions of a bird drinking from a fountain or other water source. It is sometimes considered a perpetual motion device.

When the head of the bird is moistened with water, then it will repeatedly bend down and appear to be drinking from a cup water which it is in front of it. The dunking is due to the evaporating water , which cools the head reducing the pressure of the gas inside. The liquid inside the bird rises up from his tail towards his head, causing the bird to bend down and appear to be drinking. When the bird dunks, the liquid returns to its tail, and the process begins again. In essence this is a small, cleverly designed thermodynamic engine which only needs water to run!

Shipping:

Items will be sent to all the countries over the world, (Russian Post was affect by LCACS, so the local mail delivery services (including EMS) will be delayed many times) The shipping costs to all countries are the same. Item will be shipped within 1-2 business days This package will be sent by China Airmail Post or HK post airmail Items will be checked carefully before sent out. We will use air bubbles to wrap the items carefully

Notice:It’s has registered mail and common mail . Registered mail need to pay the other $2 .If you want to sent by registered mail ,please pay it and note on the item .Thanks .

Shippingtime:

Sales Tax:

No Sales Tax is Require

Payment:

Warranty & return: For ensuring all the items are in good quality, we will test all products before the packages were sent out . 30 days warranty from the purchased date. Please contact us via email before returning the defective item. Return items should include the original packaging and all accessories.

Only defective product will be offered exchange.

Contact us :

Our office hours are :

- 8:30 a.m. to 6:00 p.m. (GMT +8) of Monday to Friday

- 8:30 a.m. to 1:00 p.m. (GMT +8) of Saturday

- 8:30 a.m. to 6:00 p.m. (GMT +8) of Sunday

- Our office is closed on public holidays (China). We apologize for the late reply during the holidays.

We have always been trying to provide the best service and reliable products for every customer. Please contact us to resolve any issue before leaving negative feedback . we will assist you in any way possible and aim to answer all emails .

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