Can anyone recommend a good HUGE drinks tumbler

[Redglitter]

I'm looking for one of the big tumblers with a handle and straw that's LEAKPROOF. I bought one from Amazon this week. Said it was leak proof - it's not.

I work weird hours so my work bag will have whatever meals I need, my contigo coffee mug, fruit etc. I need something that, like my coffee mug I don't need to worry about falling over

Any recommendations?

I have a 750ml Super Sparrow one, they do a litre one as well, it keeps drinks freezing cold overnight & comes with 2 different tops, including a sports cap & a neoprene cover with shoulder strap, it was £17.99 from Amazon