YUDODO Pet Dog Sling Carrier Breathable Mesh Travel Safe Sling Bag Carrier for Dogs Cats (S up to 5lbs Pink) https://www.amazon.com/dp/B06Y5ZSCYS/ref=cm_sw_r_apan_i_C89QG3TVXTB02K0B245C?_encoding=UTF8&psc=1

I used this sling for the first month or 2 of having puppy. I think I got the small size that fit him till he was like 5/6lb and then he was too big for it. I have a 15lbs tweenie dachshund though so perhaps yours will be able to stay in it for longer.