you could try submersing the tube upside down in water then injecting the gas into it with a needle. it will be contained inside the tube because of bouyancy. then you would either have to seal it...
Type: Posts; User: carltonbcool
you could try submersing the tube upside down in water then injecting the gas into it with a needle. it will be contained inside the tube because of bouyancy. then you would either have to seal it...