Baby food, baby water, baby sunscreen, baby wash, baby toothpaste. Some products sold for babies have specific features; some are just hype.
Baby food can be made at home. Commercial baby food can be convenient those first weeks when the time and effort to produce a smooth puree may outweigh the cost to buy it. Move baby to thicker and chunkier solids as tolerated, and by 7 to 9 months, soft fruits, steamed vegetables, and beans can often be fork mashed. Information on starting baby on solids foods is here.
Baby water is water that contains the recommended level of fluoride to help the developing adult teeth resist cavities. Most public water supplies are safe and fluoridated making baby water unnecessary. If you your water isn’t fluoridated or you prefer bottled water, you should buy water labeled for babies (sometimes called nursery water) so that you know your baby is getting the right amount of fluoride.
Baby sunscreen. Babies need sun protection. Pick a sunscreen with zinc oxide or titanium dioxide for the best protection. The safety of the ingredients is more important than the word “baby” on the label, so check your selection on a site like Skin Deep. There’s more on sun protection here.
Baby wash. Unless you must have that baby product scent, use any mild soap. Again check ingredients for safety here. Same for moisturizers.
Baby toothpaste. Regular toothpaste has fluoride and eating or swallowing excessive amounts can be unsafe. Some experts recommend that parents use a baby tooth and gum cleaner that doesn’t have fluoride until the child can spit it out after toothbrushing; others feel that fluoridated toothpaste protects the teeth from the outside and recommend parents supervise brushing using a smear of toothpaste for children under two years and a pea-sized amount for older children. See the recommendations here and check with your pediatric dentist.