Fortunately, Yeti cups are allowed on airplanes, both as a carry-on and in checked baggage. The only requirement is that they are empty when you pass through the security checkpoint.
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Frozen liquid items are allowed through the checkpoint as long as they are frozen solid when presented for screening. If frozen liquid items are partially melted, slushy, or have any liquid at the bottom of the container, they must meet 3-1-1 liquids requirements.
TSA agents and passengers are expected to followthe3-1-1? rule for liquids. The reason for not allowing liquid is that terrorists could bring liquid explosives or components to make explosive through water bottles.
You can bring metal or stainless steel water bottles on to plane in both the carry on and checked luggage. When carrying in hand luggage, water bottles must be empty to pass through airport security as liquids of 3.4 ounces (100 millilitres) or greater per item are prohibited.
You can bring metal or stainless steel water bottles on to plane in both the carry on and checked luggage. When carrying in hand luggage, water bottles must be empty to pass through airport security as liquids of 3.4 ounces (100 millilitres) or greater per item are prohibited.
Solid food items (not liquids or gels) can be transported in either your carry-on or checked bags within the continental United States. Liquid or gel food items larger than 3.4 oz are not allowed in carry-on bags and should be placed in your checked bags if possible.
Not only that but the ice itself is typically made from the plane's tap water, which can be riddled with bacteria due to the fact that an aircraft's water tank is rarely emptied and cleaned, according to a study on the quality of aircraft water (via Insider).