What’s happening?
When you put both straws in your mouth but keep one out of the drink, the vacuum your mouth creates to sip your drink is broken by the straw hanging out in the air. The only way to get the vacuum in your mouth is to either remove the air only straw or cover it with your tongue.
When you put both straws in your mouth but keep one out of the drink, the vacuum your mouth creates to sip your drink is broken by the straw hanging out in the air. The only way to get the vacuum in your mouth is to either remove the air only straw or cover it with your tongue.
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