I use the largest size most often. The large one is suitable for smoothie straws and commercially available reusable straws, as well as straws from Chickfila (which I made as a size test. It also cleans dried strawberry seeds perfectly and does not scratch plastic straws. The bristles are soft, but the wire is made of type "Stainless Steel" Haven't tried cleaning the cleaning brushes myself, other than rinsing with soap etc. When they're a little older I'll try them in the dishwasher but they're not that far I've been able to find there are dishwasher reviews. Although for the price it's not bad given you use as much as a sponge and throw away.
Bayes Stainless Steel Cleaner, Polish, And Protectant - High-Performance Formula For Sparkling Indoor And Outdoor Surfaces - 16 Oz
33 Review
Mold Remover Gel, Household Washing Machine Cleaner For Washing Machine, Refrigerator Strips, Grout Cleaner Best For Home Sink, Kitchen, Showers(1Pack)
34 Review
SWDK Electric Handheld Rechargeable Frequency
26 Review
Karcher FC 5 Cordless Hard Floor Cleaner: Ultimate Full Size Cleaning Power in Vibrant Yellow
25 Review
Dunlop SP Sport Maxx 050 235/55 R17 103Y summer
41 Review
Vileda Ultramax set
102 Review
Xiaomi Mijia Automatic Foam Soap Dispenser MJXSJ01XW/MJXSJ03XW, white
95 Review
Effortlessly Clean Hard Floors With DEERMA'S 360° Rotation Spray Mop - Includes 8 Microfiber Refills And 350Ml Water Tank
42 Review