Yes. The 420 Flex Shaker is fully dishwasher-safe — bottle, lid, and shaker ball. Top-rack is preferred for longevity, but it can handle the bottom rack too. No warping, no rust.

No. That's the whole point of 18/8 stainless steel. Unlike plastic, steel doesn't absorb or retain odors from supplements, protein powders, or anything else. A standard wash keeps it fresh.

Absolutely. The vacuum insulation keeps cold drinks cold for several hours. Even a 90-minute session in a warm gym won't touch the temperature. Add ice if you want it extra cold.

No. The 420 Flex logo is laser-engraved directly into the steel — not printed, not stickered. It cannot peel or fade. Drop it, scratch it, run it through the dishwasher — the logo stays put.

When closed correctly, no. The lid seals tight and is designed to handle being in a gym bag without leaking. Always make sure the lid is fully twisted before tossing it in your bag.

It's made for it. One Berry Blaze stick pack in 10–16 oz of cold water, shake for 15 seconds, done. The mixing ball and lid are designed to handle fine powder supplements with no residue.

We stand behind everything we make. If there's a defect or something doesn't meet expectations, reach out within 30 days and we'll make it right. No interrogation, no runaround.