I can totally relate to the kitchen supplies thing. Since starting keto I’ve spent a fair amount of money on new toys for the kitchen. I found myself surfing Amazon last night for a whipped cream canister after some of these posts, but then contented myself to using my whisk as usual for now. For now… LOL
Oh, I should warn you that when you shake the travel tumbler, it builds a little pressure. I don’t know what process makes this happen, but I’ve found it’s a good idea to release the pressure (by hitting whatever button opens it so you can take a sip) before actually unscrewing the lid.