Key points for purchasing a bouncing vacuum cup
Bouncing lid
Equipped with a safety latch to prevent accidental opening and leakage; featuring an integrated silicone sealing ring that rebounds crisply upon pressing and remains leak-proof even when inverted. The inner lid silicone should be food-grade and odorless.
Cup capacity
350–500ml, most commonly used, with a slender body, easy to fit into the side pocket of a schoolbag.
Thermal insulation
Double-layer vacuum insulation, capable of maintaining heat for 6-8 hours with boiling water, is sufficient for daily use. There’s no need to blindly chase extreme parameters.
Avoid pitfalls
Don’t buy cups with too many gaps in the lid joints, as it’s hard to clean the accumulated water stains;steer clear of inferior hard rubber rings, which are prone to aging and leaking. Don’t leave it overnight; make sure to dry it thoroughly after cleaning.
