激光第一次作此用途是加工硬度很高的材料，如钻石，或非常柔软的材料，例如婴儿奶瓶的奶嘴。
The first lasers to earn a wage did so by machining very hard materials, such as diamonds, or very soft ones, for example baby-bottle teats.
一些国家如加拿大，以及一些州如明尼苏达都明令禁止BPA用于一些塑料制品，例如婴儿奶瓶，因为婴儿对此的接触会更加危险。
Countries such as Canada and states including Minnesota have banned BPA in products such as baby bottles because infant exposure could be more dangerous.
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