Rim-Tempered (sometimes referred to as heat-treated) is similar to Fully-Tempering, except that the heat is concentrated on the rim area, followed by the cooling process, allowing for a stronger more durable product. Sure Guard™ is the foodservice industry's most extensive glassware guarantee. Anchor Hocking guarantees its entire foodservice line against chipping. If the rim of a tumbler or the foot or rim of a piece of stemware chips in normal use, Anchor Hocking will replace the item or refund the purchase price when returned to the dealer or distributor from whom it was purchased. Naturally, this guarantee does not cover breakage.