“The replacement tumbler is waterproof thank you.
It keeps my drinks fairly cool.
But nit as cold as they woukd be jet if the lid was plastic under and metal on top..
Like the S'WELL drinking tumblers.
These keep my drinks ICY COLD for 12 hours.
Because the top is insulated..not the thin plastic. BUT they ARE waterproof so can be taken out, without fear of bags becoming soaked....please can you make an adjustment with the lids, to make them insulated too please. Then they would be perfect.”
