Bluevua RO100ROPOT Countertop Reverse Osmosis Water Filter System, Portable RO Filtration with Remineralization, No Installation, WQA Certified - ROPOT-UV, 6-Stage RO

They also make counter top options such as these: https://www.waterdropfilter.com/products/countertop-ro-system-corero-system-c1s https://www.amazon.com/dp/B0CNPMRFXS Or it may be worth investing in an under sink setup if you own a house. Typically they pay for themselves over 6-12 months depending how many bottles you'd go through.