Search query: gallon jug cleaner bottle

Product: LiKee Long Bottle Cleaning Brush 18" Extra Long x 2.17" Extra Wide Cleaner for Washing Decanter, Thermos, Water Bottle Brush Washer Tip: There is a wire circle at the tip of the brush in order to make sure more bristle below.
So it would not fit into a bottle with small opening unless you have to force it.

Specification:
Material: plastic
Color: White+Green
Size: approx. 18in*2.17in*2.17in (L*W*D)
Perfect for bottle and cup cleaning
Powerful cleaning ability, convenient to hold, durable and practical

Your Best Choice for a Bottle Cleaning Helper
DESIGNED FOR: glass jars, vases, tea pots, canteens, tumblers, plastic bottles, water bottles, thermos,
EZ Cap bottles, pitchers, carafes, sauce jars, Decanters, Brewing Bottles. Long Bottle Brush - 18" extra long brush x 2.17" diameter wide. This bottle cleaner is perfect for cleaning the inside of bottles, even on the deepest bottom. But a wire circle make it hard to fit into bottle with small opening.
Durable Material with Simple Use - made of premium quality materials, with durable bristles and comfortable-grip handles that will provide many years of use. This bottle cleaning brush is designed with a lengthened body, so it is more convenient to hold it when cleaning.
Powerful Cleaning Ability - The bristles are stiff, durable and strong, gives a good amount of abrasion when trying to scrub out hardened stains.
Designed with more bristles at the bottom of the brush, helps clean the bottom of your bottle well. It can clean the whole inside of a bottle well.
Wide Application - Durable brush easily washes the inside of water bottles, decanters, stainless steel brewing utensils or wide bottles, glass jars, vases, tea pots, canteens, tumblers, plastic bottles, water bottles, EZ Cap bottles, pitchers, carafes, sauce jars and so on. LiKee Green

Product: ALINK Water Bottle Cleaning Brush, Long Angled Design with Hook ALINK Water Bottle Cleaning Brush, Long Angled Design with Hook and Comfort Grip Perfect Length - 15.7” long brush can reach the bottle bottom and clean all inside area, great for your travel bottles, thermos and hydro flask
Safe Material - Made of nylon bristles and food grade stainless steel wire - BPA free and Lead free
Curved Design - Special design can clean every angle, especailly the corner, the hook provided to hang it for drying and storage
Efficient Cleaning - The bristles is stiff, druable and fine, stronger than regular brush, adds more power when scrubing stains
Not completely satisfied, get a prompt refund or replacement. Great gift choice for your families and your friends ALINK