礦物粉餅的保存期限?

<span style="font-family: "Helvetica Neue", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 14px; line-height: 21px; white-space: pre-wrap;">各位我都是用礦物粉餅</span><br style="box-sizing: ber-box; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 14px; line-height: 21px; white-space: pre-wrap;" /> <span style="font-family: "Helvetica Neue", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 14px; line-height: 21px; white-space: pre-wrap;">最近買了一個美國礦物粉餅~他可保存5年</span><br style="box-sizing: ber-box; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 14px; line-height: 21px; white-space: pre-wrap;" /> <span style="font-family: "Helvetica Neue", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 14px; line-height: 21px; white-space: pre-wrap;">但我買的另外一個美國牌子是保存5年但是開封後要2年內用完</span><br style="box-sizing: ber-box; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 14px; line-height: 21px; white-space: pre-wrap;" /> <span style="font-family: "Helvetica Neue", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 14px; line-height: 21px; white-space: pre-wrap;">他的包裝上面就有標示</span><br style="box-sizing: ber-box; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 14px; line-height: 21px; white-space: pre-wrap;" /> <span style="font-family: "Helvetica Neue", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 14px; line-height: 21px; white-space: pre-wrap;">但是我最近買的那個沒有標示~所以是可以一直使用到5年嗎??</span>