Perrier is a famous French sparkling mineral water. It comes from a spring at Vergèze, in the south of France, and the bubbles are natural — they are already in the water, not pumped in later the way they are with many cheap fizzy drinks.

Perrier is a famous French sparkling mineral waterPerrier是知名的法國氣泡礦泉水 It comes from a spring at Vergèze, in the south of France它來自法國南部維爾傑茲（Vergèze）的一處泉水 and the bubbles are natural氣泡是天然的 they are already in the water, not pumped in later the way they are with many cheap fizzy drinks本來就在水裡，不是像很多便宜氣泡飲料那樣後來才打進去的

People order "a Perrier" the way they order a brand, and sometimes, a little loosely, they use the name for any posh bubbly mineral water, the way some people say Kleenex for any tissue. In a restaurant it often just means "the sparkling one, the French one," with a slightly expensive flavour.

People order "a Perrier" the way they order a brand大家點『a Perrier』的方式就像點一個品牌一樣 and sometimes, a little loosely, they use the name for any posh bubbly mineral water有時候也會鬆散地用這個名字泛指任何高級氣泡礦泉水 the way some people say Kleenex for any tissue就像有人把任何面紙都叫Kleenex一樣 In a restaurant it often just means "the sparkling one, the French one,"在餐廳裡它常常就是指『那個氣泡的、法國的』 with a slightly expensive flavour帶點稍微高檔的味道

Write it with a capital P: it is a brand, not a generic English noun.

Write it with a capital P要寫成大寫的P開頭 it is a brand, not a generic English noun因為它是一個品牌，不是通用的英文名詞