BareOrganics ホエイシェイカーボトル（内蔵リッドミキサー付き）

I fill this with 700ml of water and protein powder every morning and the flip top means I'm not unscrewing a cap with wet hands. The wheat straw material has a slight texture that feels nicer to grip than my old plastic bottle.

The built-in mixer actually breaks up protein powder clumps, which my old bottle never did. And knowing it's made from wheat straw instead of plastic makes me feel a little better about tossing it in my bag every day.

I was skeptical about the wheat straw material, but it’s surprisingly sturdy and doesn’t hold onto smells like my old plastic one did. The built-in mixer at the bottom actually breaks up my protein powder without leaving clumps, and the flip top opens easily even when my hands are sweaty.