Instruction: This shaker cup suitable for mixing various powder supplements such as Protein powder, Creatine, Keto, etc. Dishwasher safe, but may have a incompatible with some particular High temperature dishwashers. The acceptable temperature range of the blender shaker bottles are -4°F to 248°F. If you want to fully fill the bottle to above the last 24oz scale till the very top, please make sure screw the lid an extra bit, or there may have a chance of leaking drops due to the pressure!. Leakproof: These shaker cups have a removeable high qualty rubber ring to ensure no leaking. The screw thread of the lid and the cap also have a special design to it, the easy access feature of the lid make it locks and unlock itself easily up to two turns, and the cap of the protein powder shaker bottle will always towards to the scale side, you can easily check how much fluids left every time you pick up the bottle. Just make sure everything is screwed on all the way, and you are good to go!. Design: No logo, clear shaker bottle, grey cap, with a little charcoal grey, solid as barbell! These shakers for protein shakes are design for fitness, No need for colorful shaker bottle pack, simplicity is the ultimate complex! Within the simple but sturdy design, the improved wide mouth bottle shape fits in most cup holders. The strong handle makes it good to carry on your finger during transport, or attach it to your bag, backpack, etc. with a carabiner accessory. Twist Lock Lid: These shaker bottles for protein mixes has a solid twist lock lid design to reduce the chance of breaking or leaking after multiple uses than normal snap lid shaker cups.These protein shaker also include a safety lock on the protein shake bottle, just open it and flip it back till the very end, and you won't worry about the lid hitting your forehead or the lid flip back while you are drinking anymore. Material: Our 2 pieces 24oz/700ml shaker bottles are made from BPA Free material and wire whisk ball are made from food grade stainless steel, both compliant with US FDA standards. With better material and craftsmanship, This protein shaker bottle's bottom can be shaped into a 3D round shape to reduce the shake repetitions and makes it easier to clean as most contents tend to flow to the center of the base instead of hanging out to dry and harden on the edges.