For your girlfriend's birthday gift, I suggest you choose those gifts that are more innovative and personalized. Haha. Girls prefer exquisite and novel gadgets. I have the following suggestions, you can refer to them, haha~
Fun luminous pillow: Fun luminous pillow is a very popular way of giving gifts. This pillow not only has all the functions of ordinary pillows, but also has a light energy device inside. It will light up when you hug it at night and can provide lighting. Very interesting.
Fun sun jar: Fun sun jar will glow when the light is dim and can provide lighting. It is really amazing. You can go to a special gift website to order one.
Personalized customized water cup: Photocopy your girlfriend's photo on the water cup, and the cup should be more exquisite and novel in appearance. Then give it to her. Every time she drinks water, she will see this cup and think of you in her heart, haha.