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Frost Buddy is a small business that specializes in universal thermal-controlling drinkware. 

Check out a TikTok of the Frostbuddy in action. 

It comes with a lid, so you can also use it as a regular thermos to keep drinks icy cold and super hot! TBH, you can even pop a hot coffee cup into this to keep it warm, so the Frostbuddy is technically also a Hotbuddy. 

Promising review: “I absolutely love this! I use this all the time for my coffee from Starbucks, and it is amazing! I’ll get iced coffee at 9 a.m. and still have ice in it at 7 p.m. I have many Frost Buddy products now, and their entire line is phenomenal. This is definitely a must-have item for coffee or tea drinkers. I love that it also comes with a leakproof lid, so you can put your own drink in there, too. Overall, awesome product!” —EHW

Get it from Amazon for $39.99 (available in 15 styles).