Quality covers can help to improve a dish in a number of ways, through texture, flavor and cooking speed. Stainless steel cookware lids under $55 help cooks to control the heat throughout the pot or pan whilst manipulating condensation and evaporation to alter sauce thickness. Flat lids can be placed at an angle to prevent condensed water from returning to the pot. Welded handles are prone to breakage, so riveting systems are generally preferred. This form of attachment is further improved by some manufacturers, who engineer a more innovative rivet that is more durable than most. Stainless steel cookware lids under $55 need to retain the right level of heat, as this affects the size of the portions that can be cooked inside them. When covers are poor temperature retainers, they require the preparation of cut portions in batches, which is less than ideal when using pots intended to prepare large quantities. Covers are offered in a range of finishes from natural brushed steel to high gloss mirror finishes. Durability is further improved by heavy gauges and well clad metals. Stainless steel, unlike aluminum, does not form holes or dents after long term use or exposure to sudden temperature changes. Stainless steel alloys are another way to improve longevity.