Stainless Steel Tea Tumbler with Infuser

The threads on the lid and cup body must fit well. If the fit is too loose, the cup leaks. If it is too tight, you cannot open it easily. We make our threads with CNC lathes. The precision is controlled to ±0.05 mm. For every batch, we check the threads with thread gauges. The go gauge must screw in. The no-go gauge must not screw in. After assembly, we do a smoothness test. You should feel no sticking when you turn the lid with your fingers. We also do a torque test. We use a torque wrench to measure the tightening force. The standard is 2 to 3 Nm. If the torque is too low or too high, we adjust the mold. This gives every stainless steel tea tumbler with infuser a perfect fit.

We do open-close durability tests. We open and close one lid 5,000 times. After 5,000 cycles, we check the threads for wear. We also check the seal ring for shape change. In addition, we do high temperature aging tests. We put the lid in an oven at 80 degrees Celsius for one week. Then we take it out and check for deformation. Some plastics soften at high temperatures. Our PP material can handle temperatures above 100 degrees. Only thread designs that pass these tests go into production for this product.

This product is perfect for families or small offices. The 1.5L, 1.8L, and 2.2L sizes keep drinks hot for 12 hours. The infuser lets you brew loose leaf tea. The threads are made with high precision, so the lid does not leak. You can also customize the body with paint or powder coat. No pattern options for this model. The large size means you do not need to refill often. Buy this stainless steel tea tumbler with infuser for camping, picnics, or long meetings.

Here are five key specs for this stainless steel tea tumbler with infuser.

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