What is this sticker actually for?

It is a decorative decal with the slogan "Keep Calm Lift Weights." It goes on a bottle, laptop, locker or gym bag to show off the lifter's mindset. It does not do anything for training.

Will it survive a water bottle and washing?

Stickers on bottles usually hold up best on smooth, dry, flat areas, and hand washing is gentler than a dishwasher. No material or adhesive detail is given, so treat repeated soaking as a risk.

Is it a good gift for a lifter?

Yes, if the person enjoys gym-humor merch and the Keep Calm format. It is a small, low-commitment gift rather than a piece of gear they would train with.

How is it different from other gym stickers?

The difference is the message and the crown-and-slogan layout, not performance. Other lifting stickers offer different slogans or artwork, so pick by which line the lifter would actually use.

Can I put it on a car or helmet?

It can go on smooth, clean surfaces, but outdoor use means sun, rain and washing. Without stated weather resistance, expect it to wear faster there than indoors.