微信里没有漂流瓶是因为没有开启漂流瓶功能。
微信开启漂流瓶方法：
1.打开微信。
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2.点击屏幕右下角的我。
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3.点击设置。
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4.点击通用。
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5.接着点击发现页管理。
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6.最后开启漂流瓶开关就可以了。
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拓展资料：
微信是腾讯公司于2011年1月21日推出的一个为智能终端提供即时通讯服务的免费应用程序，由张小龙所带领的腾讯广州研发中心产品团队打造。微信支持跨通信运营商、跨操作系统平台通过网络快速发送免费语音短信、视频、图片和文字。