20 oz. Tumbler Glass Insert

These work wonderfully! My daighter became allergic to her metal tumblers but still wanted to use them due to their ability to keep drinks cold for long periods. She has multiple brands and shapes of cups and they worked great! Will definitely need some more. They were out of stock so they took awhile to come in but were totally worrh the wait.

If you bought a tumbler a few years ago, as i did, this insert does not fit! They changed the tumbler. This insert, bottom, is .5 inches wider than the old inserts. Now I need to buy the whole tumbler. My old expensive tumbler is useless!!

Great product, better customer service

The insert is truly glass, don’t drop it in the sink…. just say’n. As an insert it is top notch and truly improves flavor. How’d I live without? I bought a second in fact.