Parents in Chapel-en-le-Frith and Whaley Bridge in Derbyshire are being warned by police of the dangers of giving children alcohol.
It comes after a large amount was seized from a group of youngsters at a bonfire celebration at Whaley Bridge on 6 November.
Supplying alcohol to someone under 18 can carry an on-the-spot fine of £80 or a court fine of up to £5,000.
Sgt Tim Barlow stressed that such behaviour was irresponsible.
He said: "From the type of alcohol we seized, it had been brought from home rather than purchased by the youngsters from off-licensed premises.
"It is irresponsible and disappointing that parents have provided youngsters with alcohol."
He added: "We accept that some youngsters have taken the alcohol without their parents' knowledge but, worryingly, a significant number have been supplied with the alcohol by parents or other adults."