Ishizuka GlassKitchenToolIG-5

What is the role of the 'lip tempering process' mentioned in the description of the children's glass cup?

When reading descriptions of children's tableware, one may come across the unfamiliar term 'lip tempering process' and want to know how this treatment reinforces fragile glass cups.

hmmm editorial answer

It is a processing method that solidly reinforces the rim of the glass where the lips touch, helping to prevent it from easily chipping upon impact.

'Lip' refers to the top rim of a cup or bowl where the lips touch. On glassware, this rim is thin and frequently comes into contact with external objects, making it an area prone to getting scratched or broken when subjected to impact.

Ishizuka Glass's kids pattern glass cups and bowls have tempered processing applied to the lip area where the mouth touches when eating or drinking^[1]^[2].

It intensively enhances the strength of the rim. It reduces the risk of the edge chipping, even if a spoon bumps against it while a child drinks a beverage, or if it touches other dishes during washing and storage.